On my dual quad core MacPro (10.6.5), running 64-bit Windows 7 Pro, I get blue screens several times a day if I use more than one cpu. I have 16GB of memory, and allocate 4 to the VM. Parallels keeps telling me to use just one CPU, but then Windows is too slow to use. I filed several crash reports and filed a support request, and was told to come here for an answer. Does anyone else see this problem?