You might also locate the folder in Program Files (or other install location) that the install folder is located and make sure that the folder is deleted AFTER you attempt the uninstall.

To determine the location of the driver, you can find the device in your Device Manager (accessible from the Control Panel) and double-click the device. From there, you can get the driver details and this will give you the location of the driver files for deletion. Of course, if you know the file names, you can do a search on your hard drive and delete them using this method.

Hope this helps.