You should avoid manually deleting any files contained in the C:\Windows\WinSxS folder or any of its subfolders. This is Microsoft's warning 'Deleting files from the WinSxS folder or deleting the entire WinSxS folder may severely damage your system so that your PC might not boot and make it impossible to update.'
The Temp\PendingRenames subfolder is used by Windows Update to store files temporarily when the existing files are in use by the system and is normally cleared when files are updated during a system restart, but occasionally they do not get deleted and remain in the folder. Sometimes running Windows Disk Cleanup (see below) will trigger Windows to complete the task.
Tap on the Windows-key if you are not on the start screen.
Type Disk Cleanup and select "Free up disk space by deleting unnecessary files".
Click on the button "Clean up system files". The application restarts and additional cleanup options are available.
Look for the entries "Previous Windows installation(s)" - if you have upgraded from a previous version - and "Windows Update Cleanup". Select these and any others you want to clean. It is safe to select all available options.
Note: If you select the above two options you will no longer be able to restore a previous version of Windows or a previous update.
After running Disk Cleanup perform a system restart and then repeat the procedure, restarting again.
Edited by dls62, 03 December 2013 - 11:07 AM.