By default before Windows Update restart, it will show you warning that it will restart in 10 minutes and you could postponed it. It is possible to set policy in group policy that enforce computer to restart after update without warning that is custom setting in group policy , if your PC is part of domain that could be the issue or you might set that policy locally or it is some other issue.
Could you write that in English please. If I had the technical knowledge to know what 'group policy' meant I probably wouldn't have this problem. And yes, Windows7 and my computer constantly shuts down WITHOUT NOTICE