BleepingComputer.com: Antipiracy 'false Positives' Tackled In Windows

Microsoft will start to give some customers the benefit of the doubt with an updated version of its software antipiracy tool, Windows Genuine Advantage Notifications. The company has added a new category to the tool - ‘indeterminate’ - for instances where it can't be sure whether the OS running on a user's PC is legitimate or not...

The issue has arisen partly because, through no fault of the customer, the wrong product activation key can sometimes be used to unlock a legitimate copy of the OS.