Uhm if you dont have it, download CCleaner ( AKA CrapCleaner ). Install the latest version. Delete the dll. Go into CCleaner. Click issues ( In the sidebar on your left hand side ). Then click "Scan For Issues". After it finds it click it so it has a green tick next to it. Then click "Fix selected Issues". Should permanently delete it from your system. Other then that idk. Never had to delete something from system32.