This is an incredibly late reply, but anyway. I literally am facing this exact problem, though it's with Fallout 3! I uninstalled Nikon movie editor, and now when ever I start Fallout 3, I get a crash to desktop with the install wizard saying it there was an error with removing nikon movie editor! I found that for some reason, within the task manager, when i click on the install wizard error and click 'take to process' it highlights fallout 3?! Bizarre! I have no idea why, something definitely went wrong with the uninstall. I am trying to find other options now to fix this. I cannot uninstall again in program files, even though nikon movie editor still shows up, the uninstall option is not there?