docs(install): polish Windows section + Service/Update/Troubleshooting

  entries

  PR #1529 added the Windows installer but the rendered README sections
  had a stray blank line inside the install one-liner's code fence and
  the cross-platform Service Management / Updating / Troubleshooting
  sections still only covered Linux + macOS + Docker. Fold in Windows
  entries (Start-Service, Get-NetTCPConnection, NSSM runtime log path)
  and link the README description to the Windows Installer wiki page so
  users know where the parameter reference and unattended examples live.

README.md

@@ -629,13 +629,13 @@ Open **http://localhost:8000** and add your printer!
 
 ### Windows Native Installation
 
-Windows PowerShell:
+Windows PowerShell (run as Administrator — the installer self-elevates via UAC if not):
 
 ```powershell
 powershell -ExecutionPolicy Bypass -Command "iwr -useb https://raw.githubusercontent.com/maziggy/bambuddy/main/install/windows-installer.ps1 -OutFile windows-installer.ps1; .\windows-installer.ps1"
-
 ```
-> Installs Bambuddy natively on Windows using Git, Python, a virtual environment, separate data/log directories, and optional NSSM Windows Service registration.
+
+> Installs Bambuddy natively on Windows using Git, Python, a virtual environment, separate data/log directories, and optional NSSM Windows Service registration. See the [Windows Installer Guide](http://wiki.bambuddy.cool/getting-started/windows-installer/) for parameters and unattended-install options.
 
 ### Enabling Developer Mode
 

install/README.md

@@ -93,13 +93,13 @@ Installs BamBuddy with Python virtual environment and optional systemd/launchd s
 ```
 ### `windows-installer.ps1` (Windows)
 
-Windows PowerShell:
+Windows PowerShell (run as Administrator — the installer self-elevates via UAC if not):
 
 ```powershell
 powershell -ExecutionPolicy Bypass -Command "iwr -useb https://raw.githubusercontent.com/maziggy/bambuddy/main/install/windows-installer.ps1 -OutFile windows-installer.ps1; .\windows-installer.ps1"
-
 ```
-> Installs Bambuddy natively on Windows using Git, Python, a virtual environment, and optional NSSM Windows Service registration.
+
+> Installs Bambuddy natively on Windows using Git, Python, a virtual environment, and optional NSSM Windows Service registration. See the [Windows Installer Guide](https://wiki.bambuddy.cool/getting-started/windows-installer/) for full parameter reference.
 
 **Parameters:**
 ```powershell
@@ -233,6 +233,15 @@ launchctl load ~/Library/LaunchAgents/com.bambuddy.app.plist    # Start
 launchctl unload ~/Library/LaunchAgents/com.bambuddy.app.plist  # Stop
 ```
 
+**Windows (NSSM service):**
+```powershell
+Get-Service Bambuddy        # Check status
+Start-Service Bambuddy      # Start
+Stop-Service Bambuddy       # Stop
+Restart-Service Bambuddy    # Restart
+Get-Content "C:\Bambuddy\bambuddy-runtime.log" -Tail 100 -Wait  # View logs
+```
+
 **Docker:**
 ```bash
 docker compose ps           # Check status
@@ -288,6 +297,13 @@ git pull
 docker compose up -d --build
 ```
 
+**Windows (native):** rerun the installer; it detects the existing checkout and offers `git pull`, leaving `INSTALL_DIR\data` and `INSTALL_DIR\logs` untouched. Stop the service first if it is registered:
+```powershell
+Stop-Service Bambuddy
+.\windows-installer.ps1 -Yes
+Start-Service Bambuddy
+```
+
 ---
 
 ## Troubleshooting
@@ -318,6 +334,22 @@ Choose a different port during installation or stop the conflicting service:
 sudo lsof -i :8000  # Linux/macOS
 ```
 
+```powershell
+# Windows
+Get-NetTCPConnection -LocalPort 8000 -State Listen
+```
+
+### Windows: Service Won't Start
+Test the start script manually first:
+```powershell
+powershell.exe -ExecutionPolicy Bypass -File "C:\Bambuddy\Start-Bambuddy.ps1"
+```
+
+Then check the NSSM runtime logs:
+```powershell
+Get-Content "C:\Bambuddy\bambuddy-runtime-error.log" -Tail 100
+```
+
 ---
 
 ## Requirements