It allows you to run Windows XP in a browser, albeit with some limitations. The emulator is free for 30 minutes on trial mode, and you can use it multiple times.

This browser-based version of Windows XP is not an actual OS. Instead, it is a careful recreation containing many of the original interface elements and familiar games.

Andy Gavil, a professor at Howard University School of Law, said Microsoft's integration of instant messaging with new features in Windows XP recalls the same well-worn practice.

Windows XP, which will be retired from support in April 2014, cannot run either IE9 or this year’s IE10, making 2009’s IE8 the last stop in Microsoft’s browser line.

Microsoft is helping the estimated hundreds of millions of customers still running Windows XP, which it stopped supporting earlier this month, by providing an emergency update to fix a critical ...