If a program fails that utilizes my webcam. I have to reboot in order for another program to recognize it. I thought there was a way to refresh everything from Device Manager? Or have I been hitting the crack pipe to hard?
If the problem is not really serious you can use device manager to disable (do not uninstall) and reactivate cam.
It generally works but it's rather annoying.
Try finding better XP drivers for the cam, would be better if WHQL.