Windows: Everyone has run into the problem at some point. You want to move or delete a file and Windows flat out denies you because the file is supposedly in use. Break your file free with LockHunter.
LockHunter integrated with your system shell via the right-click menu. You can highlight any file or folder to see what processes are holding it hostage. From there you can unlock, close, or delete the selected process to liberate your file. Should you choose to delete a file the file will be placed in the recycling bin for retrieval if necessary.
If you need a portable solution for deleting files locked by Windows, check out previously mentioned Pocket Killbox. LockHunter is freeware, Windows only.