Device drivers that are uninstalled still leave entries in the registry under ENUM which I believe are Device Manager entries that can't be deleted. If I have a problem with a driver I like to completely uninstall it and start from scratch, but I can't since these entries are permanently entered into the registry with no apparent way to remove them. I have encountered times where that causes problems since the driver is really already there and no conformation boxes appear when you go to reinstalled them they way they did when they wereinstalled the first time. Especially with video devices where it is more critical.
 
Without reinstalling a previous image file (if there is one), how can these entries be deleted? I use Registry Crawler to find these left over entries of which there usually are many. This is running 2k w/sp3 and logged in as a administrator.