Some asian claiming a problem with my computer. Obvious but pathetic scammer.

Caller told me that my Windows licence has been deregistered apparently, and many people from across the world are logging in via my account and could be putting viruses and spyware onto my computer. Hung up on him and he immediately called me back asking why I hung up on him when he has important information! I listened sceptically and he told me to open the event viewer, custom views to see errors. I'm not at home and won't be answering later tonight when he calls me back again.

Caller: Someone claiming to be from the technical department of Microsoft windows. Said his name was John something....

Tried to tell me they had detected a problem with my computer. I hung up but he called again about 10 minutes later. I told him where to go and hung up.