Many clients are receiving cold calls from companies purporting to work with Microsoft and informing them that their machines are infected with a virus/spyware.The caller then proceeds to try to get the client to download a piece of software which will give them access to the computer. Once this is done they download a ‘scanner’ from the internet which ‘proves‘ that the computer is infected and offer to clean it up if the client signs up for a ‘maintenance’ contract.
These companies do not work with Microsoft and there is no way for them to be able to determine your phone number from your internet connection. This is why they need you to go to their site an download the remote control software.
Tell them in no uncertain terms to go away and if they persist, feel free to threaten to report them to the police. They are not genuine and are only after your credit card details!