Hi whatapain & welcome to the McAfee Community Forums,
Until some of our more experienced members & Moderators can arrive to review your post, could you please post back with the following infomation:
Did you permit the caller to access your computer remotely?
It is quite likely the caller was attempting to scam you. Microsoft is not in the habit of calling computer users at home without you having contacted THEM first regarding some support issue.
Message was edited by: spc3rd on 3/9/12 10:19:48 AM EST
No repuatble software company, especially Microsoft, calls people out of the blue like that. These are hoax calls, similar to spam email, the trouble is you let them into your computer. I suggest you turn off any file sharing or other networking that they may have set up and change all your passwords for email both in your computer and at any webmail accounts you have (Gmail or Hotmail or your own ISP account), plus the one you use logging into your computer and especially any online banking ones and even, if your BIOS allows it, set a password for it too. By letting a total stranger into your machine you gave him/her carte blanche to steal everything therein.
Download, install, update and run a full scan using the FREE version of THIS software. (NOT the trial of the Pro version).
Note: If any malware stops that from happening that particular software will do all that in 'Safe Mode with Networking' reached by tapping F8 repeatedly while booting up. It's usually #2 on the ensuing menu.
I should add as a footnote here, Technical Support for McAfee is based mostly in India, however they would never call anyone unless asked to do so through prior contact originating from you, the customer.
You are definetley hacked, change all passwords Install/reinstall security software and scan Your computer.