Why on earth would Windows be looking for the uninstall program in your temp space??? Did you recently upgrade your installer? Try doing a search for that filename on your hard drive (probably \windows \winnt or a system or system32 below it) for that file, and run it directly. Or, failing that, copy it to where it thinks it should be.

You might have something in the registry pointing to that as your uninstaller program location. That can be fixed if you want to search the registry for that filename and adjust it to the proper location.