A "Microsoft Windows Support" person called at 7:08 EST with a destinctive Pakistani accent.
Normally, like "T" above, I do a "pay-it-forward" by wasting as much of their time as possible so it becomes less economical for them to scam other people. But it was a bit early and I just hung up. My record time waster was over an hour, continuously putting them on soft hold while continued on with reading a book. If everyone donated a little time scamming the scammers they would have a hard time retaining their employees.
Indian woman called about a Microsoft computer problem detected and started laughing (likely a colleague joke) and couldn't continue speaking. She hung up immediately without even continuing. If you don't realize this is an obvious scam, then you change your phone number.