If you need to install an update or some software, but are told you cannot because of a pending file rename, first of all reboot the PC or server.  If this fails you can force the install by renaming the “PendingFileRenameOperations” registry key at HKLM\SYSTEM\CurrentControlSet\Control\Session Manager.  Just rename the key to something like “PendingFileRenameOperationsOLD” and your update should install.