Windows Product Key Hash: LVvE4t圆kQ/wSugKQc0w694kAF4= Using Microsoft Genuine Advantage Diagnostic Tool On the side of the box is a Windows sticker I thought Windows 7 licenses once bought did not expire About 4 or 5 years ago, I bought a Advent PC with Windows 7 PRO installedĪll has been working fine until this weekend when all of a sudden I get a black Wall Paper andĪ message in the right had side to say this is NOT A Genuine version of Windows 7