My parents have been receiving calls from those Microsoft Technical Support scammers lately. Finally I was home from work when they tried calling. The guy went through the usual spiel about how they have been receiving lots of notifications on their end that my computer has viruses. He had me open Event Viewer, which all Microsoft computers have, and tried to claim all of the messages that appear are viruses.
I knew a minute or two later he was going to try to get me to go to x website which would have allowed him to take control of my computer. I told him I knew what he was doing. He literally asked me “How do you know Sir?” So I told him I have a degree in Computer Systems. He apparently didn’t want to believe me the first time I told him. I said it once again, he had a fit and hung up. I managed to keep them on the phone for about 6 and a half minutes. :D
On a serious note, if you do get a call from them, please make sure to waste their time as much as possible. Unfortunately they sometimes end up calling the elderly who often don’t know better.