video problems...

Go here:
http://www.sis.com/support/support_prodid.htm

Put a checkmark(tick) in front of: "I accept to the above." then click on "Proceed"
Accept the ActiveX download to run their product identification tool.
Procede following their prompts.
That tool will show you what Chipsets your machine runs (appropriate to your XP operating system)

Follow the rule: "If it ain't broke, don't try to fix it"

What I mean, is that since only your USB controllers are not working, download and install only the Chipset driver for USB Controller.

At some later time you can go back to the same site and consider whether or not you want to download/install the video/IDE/sound/ etc. chipset drivers.

Best Regards

i've done the steps, but on the last page, when it shows the available driver, there are one with "download now button" but the usb driver says, N/A. Provided by OS. what should i do? thanks for your patient!