I wouldn't suggest uninstalling windows updates, as they fix security holes and such. Your not trying to bypass a core system file, your trying to bypass a program. Updates may have reverted custom settings, which might be the case... Either way the updates could of given security programs like hackshield and norton higher elevation but its hardly likely.
My suggestion is to follow the guidelines of the other users who still have it working, and leave doing something like this as a last-case scenario.