One of the great new features of Windows 8, which debuts in 2012, will enable users to log on to their PCs using a Windows Live I.D. account. Originally created and marketed as a single sign-on solution for e-commerce or membership based Web sites, the Live I.D. service is now largely relegated to Microsoft’s own Web properties. But now it has been extended to Windows—and third party applications—not just Web sites. If the words “anti-trust” starts to ring a bell in your head, no need to worry. It is purely an option to utilize the Live I.D. (and now roaming) service account in Windows, and in no way are you bound to it in order to use your PC or newer Windows 8 Metro style applications.