I play oblivion and there is a mod that I downloaded which was a .zip I installed it with no problem but after a couple months aka now I want to get rid of the download file. so I try to delete it and get a error saying access denied. OK I think lets see what happens when I open the file in 7zip, what happens it that it just loops back to the directory that the file is in (obviously a corrupted file) next I get a file shredder, nope no luck. by the way there are no programs that are using it. there are also some others like this that have the same problem all oblivion mods all .zips