Sometimes while deleting a file or folder we get error like “Cannot delete file because it’s being used by another person or program”, some freewares are available for deleting such files and folders.
Unlocker: Unlocker is a freeware, provides unlock facility by context menu (right click menu). It also provides auto unlock function, when such error will occur the unlock dialog box will open automatically asking what do you want to do.
WhoLockMe: This software is available as an explorer extension. It is a dll file.
LockHunter: LockHunter is a software similar to Unlocker. The difference is LockHunter moves the deleted file to recycle bin instead of deleting permanently.
Any of these 3 is a must install software as an add-on to windows.