Hy.I have a p4p800 asus motherboard. When I insert the cd with the drivers to install the usb 2.0 drivers, it says that on windows xp the drivers will be installed when will download windows xp service pack from Windows Update.But, when i`m installing windows xp service pack there`s an error.It says the the cd key is not good or something like that.What I have to do?