This post was most recently updated on December 11th, 2018
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager]
This error message can occur if Windows was not restarted after installing or updating files that were in use by Windows.
For example, some program installations or updates need to replace files that are currently in use by Windows. Some files cannot be replaced while Windows is running. Windows must be restarted so that these files can be updated during the initial startup of Windows before they are loaded into memory.
RESOLUTION
Please go to “Start / Run”.
Enter “Regedit” which will open “Registry Editor” window.
Please go to registry key:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager]
Delete any PendingFileRenameOperations values in this key.