There aren't any automatic update scripts for Windows, so I decided to release mine.
It's really simple to configure and can run 24/7 in the background.
Automatically check for and install updates for Unturned
Warn online players of the restart
Automatically close and start servers
Automatically downloads SteamCMD
Extract the zip anywhere
Edit "config.ini" and the config section of "autoupdate.bat"
Run "autoupdate.bat", it will automatically install SteamCMD