Lol! Can't delete a .tmp file in Windows 7? Hit F5.

So it appears Windows 7 has a bug (I know, unheard of right) where files that do not actually exist anymore still appear to be valid. When you try to delete the file, you get an error saying that Windows cannot find the file, check the file's location blah blah blah. The trick? Hit F5 to refresh your screen. If the files are already deleted, they'll disappear.