Hi catilley

!
Yes, it was already enabled by default in the bios

.
The problem its not XP Mode, the problem is that Virtual PC does not work at all, its on the task manager, but nothing more, it does not show up in the tray icon area also.
Uninstalled XP mode, created other virtual machine, and it is the same as above.
I know about Vbox and Vmware, but I want to resolve this, because its not the first time that this happens.
Don't know if it helps but will write down my computers specs.
Windows 7 64 Professional on a Intel Core I5 750. 4GB Ram Kingston, ATI 5850, Asus P7P55D-E.
I have Eset Smart security installed, Steam and a few games, MS Office, Skype, Winrar, Nero, Firefox, Daemon Tools, and I think its all.