Microsoft will block users running counterfeit copies of Windows from installing the free Security Essentials antivirus software, the head of the company's anti-piracy group said yesterday. Security ...

A message on Microsoft's site says, "We are not accepting additional participants at this time. Please check back at later a date for possible additional availability." The beta was aimed at ...

You can't always tell if a virus has taken over a Windows computer, but many anti-virus programs leave no doubt about their presence. They'll embed toolbars in Web ...