Running Ubuntu on virtual pc 7???

Hello all, I have been trying to install Ubuntu on Virtual pc 7 but When I launch the installation of Ubuntu I get this error message :

Error:
An unrecoverable processor error has been encountered. The virtual machine will reset now
Knowing my computer configuration is :
RAM=2GO , Hard disk =320GO , Video card=ATI mobility radeon X300 128mb
And the virtual configuration I set was : 1 GO Ram and 100 GO Disk.
Would you help me please to fix this ?
