it's a
scam.
Since the recent Microsoft update--which has, indeed, caused numerous problems with my husband's and daughter's computers--there has been a revival of the old scam in which someone claiming to be from Microsoft calls your house and wants you to walk you through a step-by-step fix (for a fee).
I received a rash of these calls a few months ago, and so far today I've received two more. All have been astonishingly aggressive, insisting that I need to rectify the problem immediately, and even
calling me back after I've hung up on them to impress on me the seriousness of the situation. I've done my best to encourage these callers to find a real job that doesn't involve fraudulent behavior, but such jobs seem fewer and farther between these days.
Anyway, heads up. Maybe this will help someone.