Yes it's safe to wait a week or two... But if its available why not just apply it?
I stopped both my machines at home from updating several years ago. They both managed to trash the user accounts in the process. My laptop at least I got back with a system restore but the server had to be restored from backup. I never used to believe the tales about it wrecking machines but now I do.
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Andrue Cope
Brackley, UK