How to tell who is using a shared file (and how to close it!)

I've often had the problem, where a file is in use by an application somewhere on the network, and we can't find out who - as it needs to be deleted/renamed/opened properly etc. The way to do this: On the server with the file shared: - Go to start > Run > type compmgmt.msc - Under 'System Tools' expand 'Shared Folders' - Go to 'Open Files' That lists all the files in use by network users, right click on them and click 'Close Open File' to close it!