It is a free tool to delete files blocked by something you do not know. LockHunter is useful for fighting against malware, and other programs that are blocking files without a reason. Unlike other similar tools it deletes files into the recycle bin so you may restore them if deleted by mistake. Integrates into Explorer menu. At the moment LockHunter is in beta stage. So use it with care! More info »
And, contrarily to Unlocker, this one has no toolbar and crapware bundled with it. Great find!
Where I've always used Unlocker I found this as an alternative on Windows 7, which Unlocker doesn't support.
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