Windows 7 Home Premium 64-bit, TCMD 11x64. I've been using Windows 7 for about three months, and in that time I've had quite a few Windows crashes on hibernate or, less often, on suspend. The thing all have in common is that TCMD was running at the time of the suspend/hibernate. If TCMD is not running, the crash never happens. That does not mean that every suspend/hibernate with TCMD running crashes Windows; I'm not sure, and I don't like the idea of purposefully crashing Windows to test it.