Call came at 6:30 AM and claimed to be Windows Support Center. Said I had a computer issue they would help me solve. The woman caller with a serious Indian accent, difficult to understand, said she had my computer license # and she read some number to me and asked me to get in front of my computer so we could work on problem together! I of course politely said "No Thanks" and hung up.
For the passerby: The area they lead you to, which show this 'license number' is on every computer running any version of any Windows OS. It's all part of the scam (of course). The only person who should work on your computer is you, or the local repair show. Microsoft does NOT cold call you.