There was no actual verbal message left but it sounded like a call center in the background.

Nothing but a recording that said "goodbye" when I answered it. Then it hung up.

The guy said he was with Windows and was notified I had a problem.  I don't use Windows. I have a Mac. I asked him what it was regarding and he hung up. They are thieves calling and hoping you have Windows to ask you personal information and hack your computer. Don't believe them!

Caller said he was from Windows and that he was calling in regards to my Windows computer. He stated that he had my name, address, computer security, etc. and that he was needing access to my computer to fix a problem. When I asked who his employer was, he stated it was Windows and when I asked for his employee ID number he hung up. These guys are after your personal information, do not give them any information or even confirm anything, they are trying to get anything they can to hack your computer.

Unwelcome call on my unlisted land line @6:19 p.m. on 10/07/2016.  I hate running to see who is calling. This is very annoying. I will block it, but really I can only block 250 calls and I keep getting 5-10 calls a day.This is crazy. Sometimes I delete a number from months ago only to have to re-block it. Some of them are the similar exchanges. Thank you for this site that helps us identify these spam callers.