On my new Acer Veriton M410, I downgraded to XP using the downgrade cd provided. When I try to play World of Warcraft, I get an IRQL NOT_LESS_OR_EQUAL error with parameters "stop 0x0000000a (0x00000008, 0x0000000z, ox00000000, 0x804fc6c9)". The error message mentioned no .dll or .sys. Is there a way to determine which driver isn't being recognized? Acer Support wasn't much help. They just told me to download all the drivers on their website, which I did, to no avail.