LockHunter - It is a free tool to delete files blocked by something you do not know.
FileASSASSIN - FileASSASSIN is an application that can delete any type of locked files that are on your computer.
Long Path Fixer - Move, copy, rename and delete files and folders with Very Long Paths.
EMCO UnLock IT - Unlock file or folder, locked by the system or by an application
Wise Force Deleter - Delete Any File That Windows Can’t Delete.
IObit Unlocker - Never Worry about “Cannot Delete Files” on Your PC