Windows Modules Installer Worker causes memory hog

sfc /scannow did not work. It says:

"Another servicing or repair operation is currently running.

Wait for this to finish and run sfc again."

How long do I have to wait? Why is it doing this? All I did was apply the Windows 8.1 Update 1.

I just installed all Windows 8.1 updates in response to some of the recent news.  Right after the install, the system slowed down a lot.  My Norton 360 is reporting that Windows installer workers are essentially using 100% of the disk.  Nothing changed except the updates.  The updates reported complete as normal.

I do not see it taking a large amount of memory, just 10%, but I do notice maintenance running at odd times. It is scheduled to run in the middle of the night while I am asleep, yet when I get off work & wake my computer from it's slumber I see the system maintenance start running when I am planning to use the computer for other functions. Fairly annoying that it is not waking the computer & running this maintenance when scheduled to do so, rather than when I wish to use the computer...

The 1st option does not work, as clicking on Windows Modules Installer has the stop button (and all others) grayed out. It is set to run automatically so went to method 2.

Method 2 tells me that "Windows Resource Protection found corrupt files but was unable to fix some of them.  Details are included in the CBS.Log windir\Logs\CBS\CBS.log.  For example C:\Windows\Logs\CBS\CBS.log. Note that logging is currently not supported in offline servicing scenarios.

So I attempted to read the log in order to get a better understanding. Opening it with notepad & wordpad it tells me that access has been denied. Curious & wondering what to do next.

Hi Frank,

Refer to previous post, which has clear information about safe and clean boot. Check the issue status in the safe and clean boot and check.

Safe Mode makes Windows run only the essential drivers needed to boot into Windows.

Clean Boot disables all non-essential start up programs.