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Possible Duplicate:
How do I delete a 'locked' file?
Sometimes it happens that I can't delete a file because it appears to be in use by some program. Of course there is no obvious process using it (it's not that I don't see VLC playing an AVI I want to erase), so how can I find out what's keeping it busy?
No way to do it without installing external programs? – Matteo Riva – 2010-09-25T13:48:20.343
Process Explorer suggested by @Gilles is interesting too, but accepting this as it more directly solves the specific issue – Matteo Riva – 2010-09-25T14:08:22.787
You can use LiberKey (www.liberkey.com) to have portable solutions like that without the need of installing them on current system. – kokbira – 2012-06-11T12:48:04.970