I received a phone VM telling me to call a given number to receive a refund from Microsoft for $399. I was suspicious, but called anyway. They said this was a refund from Microsoft for a subscription that I had paid for in 2016 that was not compatible for my computer. He told me to get in front of my computer, hit the windows start key, and to type in www.1234computer.com in the run window (DON'T DO THIS!). I asked him if I did that what was going to happen? He tried to convince me that it was all perfectly safe and that nothing "like that" ,i.e., "bad", was going to happen. I said no and he had to tell me what was going to happen, or I wasn't going to do it. He hung up.
After reading the other entries on this topic, I am sure this was a scam.