Go here and d/l DEVMGR.BAT and run it. It will open the device manager. Then open view and check "show hidden devices". Open the devices. You will be amazed at all the unnecessary devices that are installed. The unnecessary one will have the left icon ghosted.
http://www.sevecek.com/res/Bat%20a%20VBS/BAT/
Seti says> This one .bat file is very usefull. But some of the others on that page are custom written files for use by the author. Deltmp.bat is one I tried and got my< My Documents > folder wiped clean. Disassemble the files first to see what they do before running them. YOU HAVE BEEN WARNED...