ShutDownGuard tells Windows where to stick automatic restarts
It's a pain, but I'm not about to disable Windows Updates. All I want is for it to be my choice when my system gets restarted.
ShutdownGuard waits in your system tray like a thug in the shadows, waiting to leap out and beat unwanted shutdown requests into submission. It uses about 2mb of memory and blocks shutdown, restart, and logoff attempts.
When it springs into action, you'll receive a balloon tip notification. Click the message to continue shutting down, click the x to close the alert, or just ignore it. If tips aren't being displayed, grab this .VBS from Kelly's Corner ( # 11 ) to re-enable them.
It's a free, tiny (7kb) download for Windows only. ShutdownGuard is packaged as a .7z file, so you'll need 7zip or a compatible app to extract it.