As i was hearing that microsoft WGA authentication is started to get cracked i also got news that the bypass ( javascript +something ) was patched by microsoft but then i hear there on zdnet its cracked again. below is quote from zdnet. "Tricking the check For the software maker, the news could be another episode of people finding a way to get around WGA. Last week, several Web sites said it was possible to bypass the piracy lock by several means, including pasting a JavaScript string into the Web browser. Earlier this year, during WGA's pilot phase, a security researcher outlined another way to trick the check." I have legal copies of Windows XP too. but enforcement of WGA check, is feeling too much frisking now. the complete article can be found here