Microsoft target scam support calls
Microsoft has now started legal action against companies that contact people "informing" them that they have computer problems.
You can now register details on the Microsoft website for them to deal with it. The link below will take you to the reporting page
Further information can be found here:
No one apart from you know what is happening on your computer, if it sounds too good to be true it probably is. We are trading standards approved and do not do things like this.