Close locked files on Windows network share

Another user can lock a file on your system when he has opened that file using a Windows network share. This can deny file system operation like moving or deleting, but You can force a close of those files.

On a Windows desktop:

Open Computer Management. This requires administrative rights. One way to do this is by opening a Windows Explorer, right-click on My Computer (or This PC), and select the menu-item Manage.
In the left-pane tree, open Computer Management → System Tools → Shared Folders
You can select the files you want to close, right-click and select ´Close Open File`.

On a Windows Server:

Open the Server Manager
In the left-pane tree, open Server Manager → Roles → File Services → Share and Storage Management.
You can select the files you want to close and click on Close Selected.