In the last week or so we have had a number of customers telling us about them receiving phone calls from various companies claiming they have been notified by Microsoft that their computer is either infected by a virus or spyware, they have no “hard drive protection” or various other mythical computer errors. 
Please do not give them any credit card details, passwords or usernames as this is not a legitimate company.  As far as we can tell, they are probably in fact responsible for infecting your system with spyware and are really only after your money. 
If you do receive a call like this, just hang up the phone and scan your system for spyware and virus infections or feel free to contact us if your unsure of how to continue.