To prevent Windows Vista restat automatically after installing updates you should go to regedit.exe, open path:
HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsCWindowsUpdateAU
and create new DWORD 32 value NoAutoRebootWithLoggedOnUsers with value 1
Video:
Prevent Reboots After Auto Update – The best bloopers are here
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