diff --git a/Agent-Windows/OGP64/OGP/Cfg/Config.pm b/Agent-Windows/OGP64/OGP/Cfg/Config.pm
new file mode 100644
index 00000000..214c6603
--- /dev/null
+++ b/Agent-Windows/OGP64/OGP/Cfg/Config.pm
@@ -0,0 +1,13 @@
+%Cfg::Config = (
+	logfile => '/OGP/ogp_agent.log',
+	listen_port => '12679',
+	listen_ip => '0.0.0.0',
+	version => 'v1.4',
+	key => 'CHANGE_ME_PANEL_AGENT_KEY',
+	steam_license => 'Accept',
+	sudo_password => '',
+	web_admin_api_key => '',
+	web_api_url => '',
+	steam_dl_limit => '0',
+);
+
diff --git a/Agent-Windows/OGP64/OGP/Cfg/Config.pm.default b/Agent-Windows/OGP64/OGP/Cfg/Config.pm.default
new file mode 100644
index 00000000..214c6603
--- /dev/null
+++ b/Agent-Windows/OGP64/OGP/Cfg/Config.pm.default
@@ -0,0 +1,13 @@
+%Cfg::Config = (
+	logfile => '/OGP/ogp_agent.log',
+	listen_port => '12679',
+	listen_ip => '0.0.0.0',
+	version => 'v1.4',
+	key => 'CHANGE_ME_PANEL_AGENT_KEY',
+	steam_license => 'Accept',
+	sudo_password => '',
+	web_admin_api_key => '',
+	web_api_url => '',
+	steam_dl_limit => '0',
+);
+
diff --git a/Agent-Windows/OGP64/OGP/Cfg/Preferences.pm b/Agent-Windows/OGP64/OGP/Cfg/Preferences.pm
new file mode 100644
index 00000000..63b8c169
--- /dev/null
+++ b/Agent-Windows/OGP64/OGP/Cfg/Preferences.pm
@@ -0,0 +1,9 @@
+%Cfg::Preferences = (
+	screen_log_local => '1',
+	delete_logs_after => '30',
+	ogp_manages_ftp => '1',
+	ftp_method => 'PureFTPd',
+	ogp_autorestart_server => '1',
+	protocol_shutdown_waittime => '10',
+);
+
diff --git a/Agent-Windows/OGP64/OGP/Cfg/Preferences.pm.default b/Agent-Windows/OGP64/OGP/Cfg/Preferences.pm.default
new file mode 100644
index 00000000..63b8c169
--- /dev/null
+++ b/Agent-Windows/OGP64/OGP/Cfg/Preferences.pm.default
@@ -0,0 +1,9 @@
+%Cfg::Preferences = (
+	screen_log_local => '1',
+	delete_logs_after => '30',
+	ogp_manages_ftp => '1',
+	ftp_method => 'PureFTPd',
+	ogp_autorestart_server => '1',
+	protocol_shutdown_waittime => '10',
+);
+
diff --git a/Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg b/Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg
new file mode 100644
index 00000000..912c6b39
--- /dev/null
+++ b/Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg
@@ -0,0 +1,9 @@
+agent_auto_update=0
+agent_update_repo_url=http://forge.runlevelsystems.com/dev/GSP.git
+agent_update_branch=Panel-unstable
+agent_update_raw_url=http://forge.runlevelsystems.com/dev/GSP/raw/branch/Panel-unstable/Agent-Windows/OGP64/OGP/ogp_agent.pl
+run_pureftpd=0
+ftp_port=21
+ftp_ip=0.0.0.0
+ftp_pasv_range=
+
diff --git a/Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg.default b/Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg.default
new file mode 100644
index 00000000..912c6b39
--- /dev/null
+++ b/Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg.default
@@ -0,0 +1,9 @@
+agent_auto_update=0
+agent_update_repo_url=http://forge.runlevelsystems.com/dev/GSP.git
+agent_update_branch=Panel-unstable
+agent_update_raw_url=http://forge.runlevelsystems.com/dev/GSP/raw/branch/Panel-unstable/Agent-Windows/OGP64/OGP/ogp_agent.pl
+run_pureftpd=0
+ftp_port=21
+ftp_ip=0.0.0.0
+ftp_pasv_range=
+
diff --git a/Agent-Windows/OGP64/OGP/Install/agent_start_cygwin.sh b/Agent-Windows/OGP64/OGP/Install/agent_start_cygwin.sh
index 2fc2060e..2ac6f9d9 100644
--- a/Agent-Windows/OGP64/OGP/Install/agent_start_cygwin.sh
+++ b/Agent-Windows/OGP64/OGP/Install/agent_start_cygwin.sh
@@ -7,6 +7,8 @@ PIDFILE="${1:-/OGP/ogp_agent_run.pid}"
 PREFS_FILE="$AGENT_DIR/Cfg/bash_prefs.cfg"
 REPO_URL_DEFAULT="http://forge.runlevelsystems.com/dev/GSP.git"
 REPO_BRANCH_DEFAULT="Panel-unstable"
+RAW_AGENT_URL_DEFAULT="http://forge.runlevelsystems.com/dev/GSP/raw/branch/Panel-unstable/Agent-Windows/OGP64/OGP/ogp_agent.pl"
+REPO_AGENT_PATH="Agent-Windows/OGP64/OGP/ogp_agent.pl"
 
 warn() {
 	printf 'WARNING: %s\n' "$*" >&2
@@ -26,10 +28,45 @@ normalize_text_files() {
 		done
 }
 
+normalize_bash_preferences() {
+	[ -f "$PREFS_FILE" ] || return 0
+	sed -i 's/\r$//' "$PREFS_FILE" 2>/dev/null || warn "Could not normalize CRLF in $PREFS_FILE"
+	sed -i -E 's/^[[:space:]]+([A-Za-z_][A-Za-z0-9_]*=)/\1/' "$PREFS_FILE" 2>/dev/null || warn "Could not normalize assignments in $PREFS_FILE"
+}
+
+install_default_config_if_missing() {
+	local target="$1"
+	local template="$2"
+	if [ -f "$target" ]; then
+		return 0
+	fi
+	if [ ! -f "$template" ]; then
+		warn "Missing template $template; cannot create $target"
+		return 0
+	fi
+	mkdir -p "$(dirname "$target")" 2>/dev/null || {
+		warn "Cannot create config directory for $target"
+		return 0
+	}
+	cp "$template" "$target" 2>/dev/null || {
+		warn "Cannot create default config $target from $template"
+		return 0
+	}
+	sed -i 's/\r$//' "$target" 2>/dev/null || true
+}
+
+ensure_default_configs() {
+	install_default_config_if_missing "$AGENT_DIR/Cfg/Config.pm" "$AGENT_DIR/Cfg/Config.pm.default"
+	install_default_config_if_missing "$AGENT_DIR/Cfg/Preferences.pm" "$AGENT_DIR/Cfg/Preferences.pm.default"
+	install_default_config_if_missing "$AGENT_DIR/Cfg/bash_prefs.cfg" "$AGENT_DIR/Cfg/bash_prefs.cfg.default"
+	normalize_bash_preferences
+}
+
 load_agent_preferences() {
 	agent_auto_update=0
 	agent_update_repo_url="$REPO_URL_DEFAULT"
 	agent_update_branch="$REPO_BRANCH_DEFAULT"
+	agent_update_raw_url="$RAW_AGENT_URL_DEFAULT"
 
 	if [ -f "$PREFS_FILE" ]; then
 		# shellcheck disable=SC1090
@@ -39,6 +76,64 @@ load_agent_preferences() {
 	agent_auto_update="${agent_auto_update:-0}"
 	agent_update_repo_url="${agent_update_repo_url:-$REPO_URL_DEFAULT}"
 	agent_update_branch="${agent_update_branch:-$REPO_BRANCH_DEFAULT}"
+	agent_update_raw_url="${agent_update_raw_url:-$RAW_AGENT_URL_DEFAULT}"
+}
+
+validate_agent_file() {
+	local candidate="$1"
+	[ -s "$candidate" ] || {
+		warn "Candidate agent file is empty: $candidate"
+		return 1
+	}
+	if head -5 "$candidate" | grep -Eiq '(<html|<!doctype|not found|404|forbidden|error)'; then
+		warn "Candidate agent file looks like an HTTP error page or text response: $candidate"
+		return 1
+	fi
+	if ! head -1 "$candidate" | grep -Eq '^#!.*perl'; then
+		warn "Candidate agent file does not start with a Perl shebang: $candidate"
+		return 1
+	fi
+	if ! grep -q 'use Cfg::Config' "$candidate"; then
+		warn "Candidate agent file does not look like the GSP/OGP Perl agent: $candidate"
+		return 1
+	fi
+	sed -i 's/\r$//' "$candidate" 2>/dev/null || true
+	perl -c "$candidate" >/tmp/gsp-agent-perl-check.log 2>&1 || {
+		warn "Candidate agent failed perl validation:"
+		cat /tmp/gsp-agent-perl-check.log >&2 2>/dev/null || true
+		return 1
+	}
+	return 0
+}
+
+download_agent_with_curl() {
+	local target="$1"
+	if ! command -v curl >/dev/null 2>&1; then
+		return 1
+	fi
+	echo "Downloading Windows agent from $agent_update_raw_url..."
+	curl -fsSL "$agent_update_raw_url" -o "$target"
+}
+
+download_agent_with_git() {
+	local target="$1"
+	if ! command -v git >/dev/null 2>&1; then
+		return 1
+	fi
+
+	local repo_dir source_file
+	repo_dir="$(dirname "$target")/repo"
+	echo "Checking for Windows agent update from $agent_update_repo_url ($agent_update_branch)..."
+	if ! git clone --depth 1 --branch "$agent_update_branch" "$agent_update_repo_url" "$repo_dir"; then
+		return 1
+	fi
+
+	source_file="$repo_dir/$REPO_AGENT_PATH"
+	if [ ! -f "$source_file" ]; then
+		warn "Updated Windows agent source was not found at $REPO_AGENT_PATH"
+		return 1
+	fi
+	cp "$source_file" "$target"
 }
 
 auto_update_windows_agent() {
@@ -47,32 +142,32 @@ auto_update_windows_agent() {
 		return 0
 	}
 
-	if ! command -v git >/dev/null 2>&1; then
-		warn "git is not installed; skipping agent auto-update and using the current agent."
-		return 0
-	fi
-
-	local tmp_dir repo_dir source_file target_file backup_file
+	local tmp_dir candidate_file target_file backup_file
 	tmp_dir="$(mktemp -d /tmp/gsp-agent-update.XXXXXX 2>/dev/null)" || {
 		warn "Could not create temporary update directory; skipping auto-update."
 		return 0
 	}
-	repo_dir="$tmp_dir/repo"
+	candidate_file="$tmp_dir/ogp_agent.pl"
 	target_file="$AGENT_DIR/ogp_agent.pl"
 	backup_file="$AGENT_DIR/ogp_agent.pl.bak.$(date +%Y%m%d%H%M%S)"
 
-	echo "Checking for Windows agent update from $agent_update_repo_url ($agent_update_branch)..."
-	if ! git clone --depth 1 --branch "$agent_update_branch" "$agent_update_repo_url" "$repo_dir"; then
-		warn "Agent auto-update clone failed; using the current agent."
+	if ! download_agent_with_curl "$candidate_file"; then
+		warn "curl download failed or curl is unavailable; trying git fallback."
+		if ! download_agent_with_git "$candidate_file"; then
+			warn "Agent auto-update download failed; using the current agent."
+			rm -rf "$tmp_dir"
+			return 0
+		fi
+	fi
+
+	if ! validate_agent_file "$candidate_file"; then
+		warn "Downloaded Windows agent was rejected; using the current agent."
 		rm -rf "$tmp_dir"
 		return 0
 	fi
 
-	source_file="$repo_dir/Agent-Windows/ogp_agent.pl"
-	if [ ! -f "$source_file" ]; then
-		warn "Updated Windows agent source was not found at Agent-Windows/ogp_agent.pl; using the current agent."
-		rm -rf "$tmp_dir"
-		return 0
+	if ! validate_agent_file "$target_file"; then
+		warn "Current Windows agent does not validate. Auto-update can still replace it if backup succeeds."
 	fi
 
 	cp "$target_file" "$backup_file" 2>/dev/null || {
@@ -81,18 +176,16 @@ auto_update_windows_agent() {
 		return 0
 	}
 
-	if ! cp "$source_file" "$target_file"; then
+	if ! cp "$candidate_file" "$target_file"; then
 		warn "Could not copy updated Windows agent; restoring backup."
 		cp "$backup_file" "$target_file" 2>/dev/null
 		rm -rf "$tmp_dir"
 		return 0
 	fi
 
-	sed -i 's/\r$//' "$target_file" 2>/dev/null || true
-	if ! perl -c "$target_file"; then
-		warn "Updated Windows agent failed perl syntax validation; restoring backup."
+	if ! validate_agent_file "$target_file"; then
+		warn "Updated Windows agent failed validation after install; restoring backup."
 		cp "$backup_file" "$target_file" 2>/dev/null
-		perl -c "$target_file" || true
 		rm -rf "$tmp_dir"
 		return 0
 	fi
@@ -106,11 +199,12 @@ cd "$AGENT_DIR" || fail "Could not enter $AGENT_DIR. Is the Windows agent instal
 
 normalize_text_files "$AGENT_DIR"
 normalize_text_files "/Install"
+ensure_default_configs
 load_agent_preferences
 auto_update_windows_agent
 
 echo "Validating $AGENT_DIR/ogp_agent.pl..."
-perl -c "$AGENT_DIR/ogp_agent.pl" || fail "Perl syntax/dependency validation failed. Install missing Cygwin Perl packages or restore a valid Windows agent file."
+validate_agent_file "$AGENT_DIR/ogp_agent.pl" || fail "Perl syntax/dependency validation failed. Install missing Cygwin Perl packages or restore a valid Windows agent file."
 
 echo "Launching GSP Windows Agent..."
 exec perl "$AGENT_DIR/ogp_agent.pl" -pidfile "$PIDFILE"
diff --git a/Agent-Windows/OGP64/OGP/README.md b/Agent-Windows/OGP64/OGP/README.md
index 3897fe64..7c83fdb1 100644
--- a/Agent-Windows/OGP64/OGP/README.md
+++ b/Agent-Windows/OGP64/OGP/README.md
@@ -21,6 +21,21 @@ Cygwin-based agent that lets the GameServer Panel manage Windows Server 2019/202
 4. Edit `C:\\OGP\\Cfg\\Config.pm` so it matches the server entry you created in the GameServer Panel.
 5. Start the “OGP agent start on boot” scheduled task (or reboot).
 
+## Startup and auto-update
+
+Use `C:\\OGP64\\agent_start.bat` or `C:\\OGP\\Install\\agent_start.bat` to start the agent manually. The launcher detects the bundled Cygwin `bash.exe` first, then falls back to `C:\\cygwin64\\bin\\bash.exe` and `C:\\cygwin\\bin\\bash.exe`.
+
+`C:\\OGP\\Cfg\\bash_prefs.cfg` controls optional restart-time agent updates:
+
+```bash
+agent_auto_update=0
+agent_update_repo_url=http://forge.runlevelsystems.com/dev/GSP.git
+agent_update_branch=Panel-unstable
+agent_update_raw_url=http://forge.runlevelsystems.com/dev/GSP/raw/branch/Panel-unstable/Agent-Windows/OGP64/OGP/ogp_agent.pl
+```
+
+When `agent_auto_update=1`, the launcher downloads to a temporary file, rejects HTML/404/empty/non-Perl content, validates with `perl -c`, backs up the current `ogp_agent.pl`, and rolls back if validation fails.
+
 ## Related repositories
 
 - [GSP](https://github.com/GameServerPanel/GSP) – PHP panel that issues commands to the agents.
diff --git a/Agent-Windows/OGP64/OGP/documentation/agent-guide.md b/Agent-Windows/OGP64/OGP/documentation/agent-guide.md
index 3c3eac66..d7db71fd 100644
--- a/Agent-Windows/OGP64/OGP/documentation/agent-guide.md
+++ b/Agent-Windows/OGP64/OGP/documentation/agent-guide.md
@@ -31,12 +31,28 @@ The Windows agent bundles Cygwin, Perl, GNU Screen, and helper scripts so the Ga
 
 ## Updating the agent
 
+Manual update:
+
 1. Stop the scheduled task or kill any running `ogp_agent.pl` processes.
 2. Pull the latest files (`git pull` inside `C:\\gsp-agent` or download the release ZIP again).
 3. Copy updated files into `C:\\OGP`.
 4. Re-run `rebase_post_ins.bat` if new Cygwin DLLs were added.
 5. Start the agent task again.
 
+Restart-time auto-update:
+
+1. Edit `/OGP/Cfg/bash_prefs.cfg`.
+2. Set `agent_auto_update=1`.
+3. Keep the default Forgejo values unless you are testing another branch:
+   ```bash
+   agent_update_repo_url=http://forge.runlevelsystems.com/dev/GSP.git
+   agent_update_branch=Panel-unstable
+   agent_update_raw_url=http://forge.runlevelsystems.com/dev/GSP/raw/branch/Panel-unstable/Agent-Windows/OGP64/OGP/ogp_agent.pl
+   ```
+4. Restart the agent with `C:\\OGP64\\agent_start.bat` or `C:\\OGP\\Install\\agent_start.bat`.
+
+The updater downloads to a temporary file, rejects empty files, HTML error pages, `Not found` responses, and files without the expected Perl agent markers, then runs `perl -c` before replacing `/OGP/ogp_agent.pl`. Failed auto-update attempts are non-fatal and continue with the last known good agent.
+
 ## Logging & troubleshooting
 
 - Main log: `C:\\OGP\\ogp_agent.log`
@@ -44,6 +60,9 @@ The Windows agent bundles Cygwin, Perl, GNU Screen, and helper scripts so the Ga
 - Customer servers run inside GNU Screen sessions—attach via `C:\\OGP\\bin\\screen -r ogp_agent`
 - Firewall: open TCP 12679 (or your configured port) and any game-specific ports before provisioning.
 - Authentication errors almost always mean the `key` in `Cfg/Config.pm` does not match the value stored in the panel → Administration → Servers.
+- `/OGP/Cfg/bash_prefs.cfg` must use LF line endings and no leading whitespace before assignments. The launcher normalizes this automatically before sourcing the file.
+- `./ogp_agent.pl: line 1: Not: command not found` means the agent file was replaced with text/HTTP error content. Restore a backup or enable auto-update after confirming the Forgejo raw URL above is reachable.
+- `The user name could not be found. NET HELPMSG 2221.` came from the legacy root launcher that queried `cyg_server`. Use the maintained launchers above; they do not require that user for manual foreground startup.
 
 ## Usage tips
 
diff --git a/Agent-Windows/OGP64/agent_start.bat b/Agent-Windows/OGP64/agent_start.bat
index 17af8858..cc6dd3f1 100644
--- a/Agent-Windows/OGP64/agent_start.bat
+++ b/Agent-Windows/OGP64/agent_start.bat
@@ -1,41 +1,20 @@
-@echo off
-@title OGP Agent
-FOR /f "tokens=2,3,4 delims=[.]" %%a IN ('ver') DO SET WVer=%%a
-FOR /f "tokens=2,3 delims= " %%a IN ('echo %WVer%') DO SET Ver=%%a
-whoami /groups | find "S-1-16-12288" >nul 2>&1
-if NOT %errorLevel% == 0 if %VER% GEQ 6 (
-	echo Failure: Current permissions inadequate.
-	echo[
-	echo Run this script by using "Run as administrator" in the context menu.
-	pause >nul
-	exit
-)
-set WD=%~dp0
-pushd %WD%
-set path=%WD%bin;%WD%usr\sbin;%path%
-set CYGWIN=server ntsec
-set SHELL=/bin/bash
-set runAgentNormally=no
-
-REM Stop any running agent
-if exist %WD%var\run\pure-ftpd.pid set /p PID1=<%WD%var\run\pure-ftpd.pid
-if exist %WD%OGP\ogp_agent.pid set /p PID2=<%WD%OGP\ogp_agent.pid
-if exist %WD%OGP\ogp_agent_run.pid set /p PID3=<%WD%OGP\ogp_agent_run.pid
-IF NOT [%PID1%] == [] kill -15 %PID1%
-IF NOT [%PID2%] == [] kill -15 %PID2%
-IF NOT [%PID3%] == [] kill -15 %PID3%
-
-REM Check for cyg_server user and if it exists and the user running this script matches, run it the normal way, else prompt for elevation
-if "%username%" == "" set runAgentNormally=yes
-if "%username%" == "cyg_server" set runAgentNormally=yes
-
-net user cyg_server
-if %ERRORLEVEL% EQU 0 (
-	if %runAgentNormally% == yes (
-		bash ogp_agent -pidfile /OGP/ogp_agent_run.pid
-	) else (
-		cygstart cmd /c "runas /profile /user:cyg_server \"%WD%\bin\bash.exe %WD%\bin\ogp_agent -pidfile /OGP/ogp_agent_run.pid\""
-	)
-) else (
-	bash ogp_agent -pidfile /OGP/ogp_agent_run.pid
-)
+@echo off
+setlocal EnableExtensions
+title GSP Windows Agent
+
+set "ROOT=%~dp0"
+set "INNER_START=%ROOT%OGP\Install\agent_start.bat"
+
+if not exist "%INNER_START%" (
+	echo Failure: maintained agent launcher was not found.
+	echo.
+	echo Expected:
+	echo   %INNER_START%
+	echo.
+	echo This checkout should contain OGP\Install\agent_start.bat.
+	pause
+	exit /b 1
+)
+
+call "%INNER_START%"
+exit /b %ERRORLEVEL%
diff --git a/README.md b/README.md
index 45030931..fabe7f74 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ The Panel is the control layer. It loads modules from `Panel/modules/`, stores p
 
 ### Windows Agent
 
-`Agent-Windows/ogp_agent.pl` mirrors the Linux agent as closely as possible for Windows/Cygwin environments.
+`Agent-Windows/OGP64/OGP/ogp_agent.pl` mirrors the Linux agent as closely as possible for Windows/Cygwin environments.
 
 ### Website
 
diff --git a/docs/agents/WINDOWS_AGENT.md b/docs/agents/WINDOWS_AGENT.md
index 9ec9b35a..0989ee13 100644
--- a/docs/agents/WINDOWS_AGENT.md
+++ b/docs/agents/WINDOWS_AGENT.md
@@ -7,6 +7,10 @@
 ## Important Files
 
 - `Agent-Windows/OGP64/OGP/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/Cfg/Config.pm`
+- `Agent-Windows/OGP64/OGP/Cfg/Preferences.pm`
+- `Agent-Windows/OGP64/OGP/Cfg/bash_prefs.cfg`
+- `Agent-Windows/OGP64/OGP/Cfg/*.default`
 - `Agent-Windows/php-query/`
 - `Agent-Windows/ArmaBE/`
 - `Agent-Windows/Cfg/`
@@ -61,24 +65,31 @@ The Cygwin-side helper performs the shell work:
 
 1. enter `/OGP`
 2. normalize CRLF to LF for `.pl`, `.pm`, `.sh`, and `.cfg` files under `/OGP`
-3. source `/OGP/Cfg/bash_prefs.cfg`
-4. optionally update only the Windows agent file from Forgejo when `agent_auto_update=1`
-5. backup the current `/OGP/ogp_agent.pl`
-6. validate the updated agent with `perl -c`
-7. restore the backup if validation fails
-8. launch `/OGP/ogp_agent.pl`
+3. create missing `Cfg/Config.pm`, `Cfg/Preferences.pm`, and `Cfg/bash_prefs.cfg` from tracked `.default` files
+4. strip CRLF and leading whitespace before assignments in `/OGP/Cfg/bash_prefs.cfg`
+5. source `/OGP/Cfg/bash_prefs.cfg`
+6. optionally update only the Windows agent file from Forgejo when `agent_auto_update=1`
+7. backup the current `/OGP/ogp_agent.pl`
+8. validate downloaded and installed agent files with content checks plus `perl -c`
+9. restore the backup if validation fails
+10. launch `/OGP/ogp_agent.pl`
 
 Default optional update source:
 
 - repo: `http://forge.runlevelsystems.com/dev/GSP.git`
 - branch: `Panel-unstable`
 - source file: `Agent-Windows/OGP64/OGP/ogp_agent.pl` in the current repo layout
+- raw URL: `http://forge.runlevelsystems.com/dev/GSP/raw/branch/Panel-unstable/Agent-Windows/OGP64/OGP/ogp_agent.pl`
 - target file: `/OGP/ogp_agent.pl`
 
-Auto-update failure is non-fatal. Missing `git`, clone failure, missing source file, or failed validation should warn and continue with the current installed agent.
+Auto-update failure is non-fatal. Missing `curl`/`git`, download failure, clone failure, missing source file, HTTP error-page downloads, empty files, or failed validation should warn and continue with the current installed agent.
 
 The Windows agent file does not use `DBI` at startup. If a Windows node reports `Can't locate DBI.pm` at line 48, it is a strong signal that a Linux agent file was copied onto the Windows node.
 
+Required Cygwin Perl packages include `perl`, `perl_vendor`, `perl-HTTP-Daemon`, `perl-Path-Class`, `perl-XML-Parser`, `perl-XML-Simple`, `perl-Archive-Zip`, and `perl-Archive-Extract`. A clean non-Cygwin Linux workstation may fail `perl -c` on these dependencies even though the bundled Windows Cygwin tree contains them.
+
+Default tracked config files contain placeholders only. Production installs must replace `CHANGE_ME_PANEL_AGENT_KEY`, `web_api_url`, and related values with the values configured in the Panel remote-server record.
+
 ## Status Logic
 
 Relevant functions:
diff --git a/docs/architecture/REPOSITORY_OVERVIEW.md b/docs/architecture/REPOSITORY_OVERVIEW.md
index 94e9c345..5c3d17b6 100644
--- a/docs/architecture/REPOSITORY_OVERVIEW.md
+++ b/docs/architecture/REPOSITORY_OVERVIEW.md
@@ -55,7 +55,7 @@ The agents are the execution layer. They:
 Important agent files:
 
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 - `Agent_Linux/startups/`
 - `Agent-Windows/ServerFiles/`
 - `Agent_Linux/php-query/`
@@ -156,4 +156,3 @@ For future investigations, start with:
 3. `docs/modules/GAMEMANAGER.md`
 4. `docs/features/STATUS_SYSTEM.md`
 5. `docs/features/XML_SYSTEM.md`
-
diff --git a/docs/development/CODEX_GUIDE.md b/docs/development/CODEX_GUIDE.md
index 5fb9ceda..3454a7f4 100644
--- a/docs/development/CODEX_GUIDE.md
+++ b/docs/development/CODEX_GUIDE.md
@@ -43,7 +43,7 @@ This file is the first stop for future Codex sessions working in this repository
 - `Panel/modules/config_games/server_config_parser.php`
 - `Panel/includes/lib_remote.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ### Status Logic
 
@@ -51,7 +51,7 @@ This file is the first stop for future Codex sessions working in this repository
 - `Panel/modules/gamemanager/home_handling_functions.php`
 - `Panel/modules/gamemanager/server_monitor.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ### Scheduler Logic
 
@@ -59,7 +59,7 @@ This file is the first stop for future Codex sessions working in this repository
 - `Panel/modules/cron/cron.php`
 - `Panel/modules/cron/shared_cron_functions.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ### Workshop / Server Content Logic
 
@@ -82,7 +82,7 @@ This file is the first stop for future Codex sessions working in this repository
 
 - `Panel/includes/lib_remote.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ### Decisions And Historical Reports
 
@@ -135,7 +135,7 @@ This file is the first stop for future Codex sessions working in this repository
 2. Check `Panel/modules/update/update.php`.
 3. Check `Panel/modules/administration/panel_update.php`.
 4. Check `Panel/includes/lib_remote.php` for the `component_update` wrapper.
-5. Check both `Agent_Linux/ogp_agent.pl` and `Agent-Windows/ogp_agent.pl` for the `component_update` RPC.
+5. Check both `Agent_Linux/ogp_agent.pl` and `Agent-Windows/OGP64/OGP/ogp_agent.pl` for the `component_update` RPC.
 6. Remember that local Panel/Website updates and remote agent updates both clone a configured Git branch into staging and copy only configured component folders.
 7. Never let updater logic delete server homes, game install folders, user data, agent `Cfg/`, logs, uploads, backups, or runtime PID files.
 
diff --git a/docs/features/COMPANION_PROGRAMS.md b/docs/features/COMPANION_PROGRAMS.md
index 1a7f527c..2eb7a8c4 100644
--- a/docs/features/COMPANION_PROGRAMS.md
+++ b/docs/features/COMPANION_PROGRAMS.md
@@ -8,7 +8,7 @@ Important references:
 
 - `docs/decisions/0003-companion-programs.md`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 - `Panel/modules/config_games/schema_server_config.xml`
 
 ## What The System Needs To Do
@@ -36,4 +36,3 @@ The system should be XML/admin-defined and agent-managed.
 ## Recommendation
 
 Keep the design centralized and game-aware. Do not rely on one-off helper files as the source of truth.
-
diff --git a/docs/features/INSTALLERS.md b/docs/features/INSTALLERS.md
index a5c4a7f7..d0dcd9dc 100644
--- a/docs/features/INSTALLERS.md
+++ b/docs/features/INSTALLERS.md
@@ -11,7 +11,7 @@ Important references:
 - `Panel/modules/addonsmanager/module.php`
 - `Panel/modules/steam_workshop/module.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ## Installer Types Seen In The Codebase
 
@@ -24,4 +24,3 @@ Important references:
 ## Recommended Model
 
 Installer strategy should come from game capability metadata. The agent should execute trusted strategies, not arbitrary customer commands.
-
diff --git a/docs/features/LOGGING_SYSTEM.md b/docs/features/LOGGING_SYSTEM.md
index d33ae591..ad6f43b2 100644
--- a/docs/features/LOGGING_SYSTEM.md
+++ b/docs/features/LOGGING_SYSTEM.md
@@ -16,7 +16,7 @@ Important references:
 - `Panel/modules/gamemanager/view_server_log.php`
 - `Panel/modules/gamemanager/get_server_log.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ## What Works
 
diff --git a/docs/features/SCHEDULER_ACTIONS.md b/docs/features/SCHEDULER_ACTIONS.md
index 37400c8e..8e9aba42 100644
--- a/docs/features/SCHEDULER_ACTIONS.md
+++ b/docs/features/SCHEDULER_ACTIONS.md
@@ -10,7 +10,7 @@ Primary files:
 - `Panel/modules/cron/user_cron.php`
 - `Panel/modules/cron/shared_cron_functions.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ## Current Model
 
@@ -103,5 +103,5 @@ Current observable logs:
 ## Search Coverage Used For This Document
 
 - `sed -n '1,260p' Panel/modules/cron/shared_cron_functions.php`
-- `rg -n "scheduler_" Agent_Linux/ogp_agent.pl Agent-Windows/ogp_agent.pl`
+- `rg -n "scheduler_" Agent_Linux/ogp_agent.pl Agent-Windows/OGP64/OGP/ogp_agent.pl`
 - `rg -n "gamemanager/(start|stop|restart)|server_content/run_scheduled_action" Panel/modules/cron`
diff --git a/docs/features/SCHEDULER_SYSTEM.md b/docs/features/SCHEDULER_SYSTEM.md
index c48de46f..f6165c92 100644
--- a/docs/features/SCHEDULER_SYSTEM.md
+++ b/docs/features/SCHEDULER_SYSTEM.md
@@ -10,7 +10,7 @@ Important references:
 - `Panel/modules/cron/cron.php`
 - `Panel/modules/cron/shared_cron_functions.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ## Current Strengths
 
diff --git a/docs/features/STATUS_SYSTEM.md b/docs/features/STATUS_SYSTEM.md
index 07304aff..cd072911 100644
--- a/docs/features/STATUS_SYSTEM.md
+++ b/docs/features/STATUS_SYSTEM.md
@@ -76,6 +76,7 @@ The Panel fallback does not replace a full agent-owned status model. It exists s
 - Marker files can become stale after crashes or power loss.
 - A game can be online even if query metadata is temporarily unavailable.
 - Some games need long startup windows, so timeouts must be configurable per game.
+- `Agent status RPC unavailable` usually means the Panel could not complete the `server_status` call. On Windows/Cygwin nodes, first verify `/OGP/ogp_agent.pl` is valid Perl, `/OGP/Cfg/bash_prefs.cfg` has LF line endings and no leading spaces before assignments, and the agent starts cleanly from `Agent-Windows/OGP64/agent_start.bat` or `/OGP/Install/agent_start.bat`.
 
 ## Planned Improvement Shape
 
diff --git a/docs/modules/GAMEMANAGER.md b/docs/modules/GAMEMANAGER.md
index 64529b5e..aa5cf93f 100644
--- a/docs/modules/GAMEMANAGER.md
+++ b/docs/modules/GAMEMANAGER.md
@@ -93,6 +93,8 @@ Current display mapping:
 
 Query metadata remains optional. A running process/session or listening game port must not be shown as red/offline only because query details are unavailable.
 
+If the monitor says `Agent status RPC unavailable`, treat it as an agent reachability/startup problem before changing query logic. For Windows/Cygwin nodes, validate `/OGP/ogp_agent.pl` with `perl -c`, check `/OGP/Cfg/bash_prefs.cfg` for CRLF or leading whitespace before assignments, and start the agent through the maintained launcher in `Agent-Windows/OGP64/agent_start.bat` or `/OGP/Install/agent_start.bat`.
+
 ## Log Viewer
 
 Relevant files:
diff --git a/docs/modules/SCHEDULER.md b/docs/modules/SCHEDULER.md
index 8a65230b..bc6975c7 100644
--- a/docs/modules/SCHEDULER.md
+++ b/docs/modules/SCHEDULER.md
@@ -10,7 +10,7 @@ Important files:
 - `Panel/modules/cron/cron.php`
 - `Panel/modules/cron/shared_cron_functions.php`
 - `Agent_Linux/ogp_agent.pl`
-- `Agent-Windows/ogp_agent.pl`
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl`
 
 ## How It Works Today
 
@@ -92,7 +92,7 @@ If scheduler behavior needs deeper investigation, start with:
 - `Panel/modules/cron/cron.php`
 - `Panel/modules/cron/shared_cron_functions.php`
 - `Agent_Linux/ogp_agent.pl` scheduler subroutines
-- `Agent-Windows/ogp_agent.pl` scheduler subroutines
+- `Agent-Windows/OGP64/OGP/ogp_agent.pl` scheduler subroutines
 
 ## Current Panel Update Finding
 
diff --git a/docs/modules/UPDATE.md b/docs/modules/UPDATE.md
index 560012e7..29685e46 100644
--- a/docs/modules/UPDATE.md
+++ b/docs/modules/UPDATE.md
@@ -59,6 +59,7 @@ Important implementation note:
 - These helpers must not be nested inside another function. A previous bad edit placed `gsp_update_settings()` inside `gsp_get_git_commit()`, which caused a fatal error when the update page called the helper before `gsp_get_git_commit()` had ever executed.
 - If the update page throws `Call to undefined function gsp_update_settings()`, first verify the deployed `Panel/modules/administration/panel_update.php` matches the repository version and that this helper exists near the top of the file before `gsp_panel_update_section()` is called.
 - `gsp_do_configured_git_update()` must also remain top-level. A bad edit placed it inside `gsp_do_update()`, so `/home.php?m=update` called an undefined function until a legacy GitHub update path happened to execute first.
+- `gsp_checkout_update_source()` must remain top-level. If it is nested inside `gsp_apply_update_from_zip()` or another helper, configured Git updates can fatal with `Call to undefined function gsp_checkout_update_source()`.
 
 ## Update Flow
 
@@ -130,6 +131,7 @@ The old repeated SSL vhost disable buttons are not part of the primary update pa
 
 - The update page fatal `Call to undefined function gsp_update_settings()` means the deployed `Panel/modules/administration/panel_update.php` is missing the top-level helper or is not the current repository copy.
 - The update page fatal `Call to undefined function gsp_do_configured_git_update()` means the configured Git update helper is missing or nested inside another helper in the deployed `panel_update.php`.
+- The update page fatal `Call to undefined function gsp_checkout_update_source()` means the configured Git checkout helper is missing or nested inside another helper in the deployed `panel_update.php`.
 - `Panel/modules/update/update.php` only loads `Panel/modules/administration/panel_update.php` and calls `gsp_panel_update_section()`.
 - The configured update action uses `git clone --depth 1 --branch <configured branch> <configured repository source> <temporary checkout>`.
 - Clone failures are logged to `logs/update_trace.log` with the configured repository source and branch.