Kittysue
They are scammers trying to gain remote access to your computer to install malware then blackmail you into paying up to $1000 or they delete everything from your computer
Watch this video to see what happens if you speak to these criminals and allow them to access your computer
http://www.wired.co.uk/article/malwarebytes
They claim to be from Yahoo, Microsoft, Dell, Google, and other well known companies but it's all the same scam - to gain access to your computer and steal your money
Anonymous
They're scammers and fake. They're bots. Always report them as spam.
Barkley Hound
They are spam and scams Report or ignore them.
Fox
spammers trying to get gullible people to call them so they can try and steal personal info