vmm.sys causes reboot

[eyeball]

Hi all,

i am running virtual pc 2007 and occasionally it reboots my entire system at random, i ran the windows debugger agains the .dmp file my pc created and it said vmm.sys is to blame, has anyone seen this before or can anyone suggest a good next step to take in debugging this? or should i just switch back to VPC 2004?

thanks