could you tell me how you fixed the vmx86.sys - reboot - problem with Win7 ?
I use Win7 Home Premium as host system and have the same problem with WinXP - guests !
Interestingly enough, rolling back to a snapshot didn't really work, but both Windows 7 and Windows Server 2008 R2 have on-board recovery mechanisms that, when you boot into them, perform the repair. I actually got the third, misbehaving VM to recover that way, so as of now, all three of my VMs are up and running. I took snapshots of their current condition, just in case, but assuming my Windows 7 host doesn't puke again, I'm good to go.
I don't think my "solution" would work on Windows XP guests for the reasons I just stated. The recovery of the VMs had little to do with the host and everything to do with the guests. In other words, I got lucky.
Thanks for your advices,
tryed it out - no effect.
Even a VM without OS installed forces Win7 64 into the Bluescreen.
I use a new ASUA notebook with AMD CPU and Win7 64 !!! HOME !!! Premium, OEM-preinstalled !
Might the HOME Edition be the course of the problem ?
MS Virtual PC f.e. is not supported by MS on Win 7 Home Edition . . .