Have a pesky file you want to move or get rid of, but it is locked by
an unknown process? If so, check out FreeFile:
[http://grubletrang.com/Software.aspx?app=FreeFile]

It allows you to analyze any file and shows you the .exe and .dll
files which have the file currently locked. You can easily kill these
processes from FreeFile as well so you can move or delete the
previously locked file.