Hmm. The only thing that comes to mind, is that your USB port is sharing an IRQ with the graphics card. Graphics cards do not like to share with anything. Perhaps someone here can advise on how to change it, if this is the case?
Larry
AMD 3000+,Epox EP-8RDA,Ram 1536mb 333 DDr, Rad 9800 pro omega 2.4.96, dx9b, Audigy, MOMO FF,winxp