Downgraded from Vista to XP, driver help pls?

Hi,

I had a horrible virus on my Vista PC and recently erased the whole partition and installed Windows XP Professional. I am on XP now, but all of my "Other Devices" drivers "PCI Device, Other PCI bridge device, PCI Simple Communications controller, SM Bus Controller, Video Controller (VGA Compatible)" all have yellow "?" and "!" next to them.

Right now I am on my mother's Vista PC. Her PC is the host, we have cable internet and my ethernet cable at the back of the XP PC doesn't blink green like it normally does (PCI?).

I think I need to fix those drivers, but can't seem to find out how. Any help would be greatly appreciated!