Question: I'm moving some files around on the server (Windows Server 2003), and there's a locked file that no one seems to have open. How do I delete this file?

Answer: 
I see this all the time, you can also run Systernal's Process Explorer to find who has the file, here's a great how-to on using Process Explorer for this purpose: [Unlocking files that are in use](http://blog.shijaz.com/2008/10/unlocking-files-that-are-in-use.html)

I personally like this way since I have this tool on my USB drive and can run it without having to install it.
A few methods are here:
<http://www.geeksaresexy.net/2007/06/04/how-to-delete-an-undeletable-file/>