LockHunter - It is a free tool to delete files blocked by something you do not know.
Revo Uninstaller - Free fully functional download of Revo Uninstaller Pro and Revo Uninstaller Freeware.
Wise Force Deleter - Delete Any File That Windows Can’t Delete.
GeekUninstaller - Efficient and Fast, Small and Portable. 100% Free. Clean Removal and Force Removal; Native X64 support; Easy-to-use User Interface; Uninstall Windows Store Apps. Geek Uninstaller. Download.
FileASSASSIN - FileASSASSIN is an application that can delete any type of locked files that are on your computer.
Bulk Crap Uninstaller - Free and open source program uninstaller. Can remove large amounts of unwanted applications quickly.