go to start, run, and type in regedit and hit enter. The registry editor will open. Be CAREFUL IN HERE. You can mess up your computer. Dont delete anything your not sure of. Go to Edit and Find and type in your web-cam maker and keep searching, finding, and deleting all the keys that are from that maker. Then search for your model and do the same thing. Reboot your computer when you're done. Then install the drivers and plug in the web-cam. Hopefully this works for you, sometimes USB can be a major pain.