Got a Dell Presion tower and some devices work in the usb ports and some do not. Some memory sticks work fine but others give me a usb error in Device Mgr. Same as some external hard drives. It does show that some devices are connected but the indication in Device Manager says that drivers are not loaded with the yellow exclaimation point. The device then does not work.

Some work fine though is strange.

Could it have something to do with Service Pack 3 with XP Pro?

Is there some setting in the bios that I need to tweak?