First of all, disable UAC! The problem with deleting files is a USER issue, in that the user has stuffed around or followed bad advice regarding things like Windows services, there's a lot of wrong information out there. In all likelihood, the service 'Application Experience' has been disabled. This will prevent you from deleting .exe files for ages. It would have only been disabled by user action or a third party app which is crap! If its the latter, then who knows what else has been stuffed around with!