to be honest that guide doesn't seem to make a lot of sense to me, it says "To enable the update for a specific device" yet how can you get the specific devices id number etc if the usb device plugged into the port doesn't show up in the first place, unless it does show up but just doesn't work?
sorry i don't have a windows pc up and running to run through the guides and give you exact steps but maybe this link will better help you find the correct numbers :- http://blogs.msdn.co...mentPosted=true
steps 2 and 3 from here also tell you how to find the correct numbers :- http://www.thewindow...working-windows
might be a bit late now but i hope you backed up your registry like the guides tell you to so we can always go back to where you started from and try these edits again if we need to.
on second thoughts lets forget about editing the registry further at the moment and try something else, open the device manager and uninstall everything that shows up under universal seriel bus controllers then reboot the machine and see if things now work when windows finds and installs them again.