USB help w/ pavilion ze5400 notebook

[Helix.]

I am running windows xp pro sp2 on my hp pavilion notebook. Before I upgraded to xp pro, my usb devices were working. Now my mouse, printer, flash drive, and every other USB device doesn't work. How do I fix this?

Thanks!

EDIT: I also have a windows vista dvd that I can install, if that will fix the problem.