Phone scams are multiplying like rabbits – beware of any phone calls or pop-ups with phone numbers claiming your computer is infected. If you see a screen like this, do not call; simply reboot your computer. These pop-ups are “advertisements” and the phone number is not Microsoft.
Microsoft has made it very clear that they will never contact you by phone, and they do not encourage “end users” to contact their support department.
If you think your computer is infected, contact your security provider (Norton, McAfee, etc.), the computer manufacturer (Dell, Apple, etc.), or your favorite local support provider (WCS!)