Microsoft is fighting back against those attempting to distribute a cracked version of Windows Vista. It has issued an update that detects whether a copy is attempting to bypass the activation system by mixing files from the test and final versions, it said Thursday. Such a version is currently available on DVD, Microsoft says. When the copy is detected, Microsoft will alert the user, and then give them 30 days to activate the software, or it will be placed in reduced functionality mode. BetaNews