Windows Update IE11 Error 9C48; KB2871997 Always Redected

A couple of months ago this system had problems with KB2918614, which, when installed, would cause all MSI files to fail to install. In the process of fixing that, I used System Restore several times to roll back to different points.

After I discovered it was KB2918614 and uninstalled it, things were fine. (Until it reinstalled itself again later and I had to remove it again.) This month, Windows Update would never finish checking for updates. I went into Add / Remove Programs to see if KB2918614 had installed itself again, but that listed no installed updates.

I tried SFC /scannow and it wouldn't run.
I tried System Restore and it didn't help.

I manually created HKLM\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing\Version according to this: Windows Modules Installer Error:126 - Microsoft Community and then things started to work (Windows Update, SFC, and updates being listed in Add / Remove Programs - though only a few were listed).

Now an optional update (IE11) refuses to install - it gives error code 9C48. (IE 11 is already installed.)
Additionally, KB2871997 succeeds, but keeps showing up.
It also doesn't seem like I got the latest batch of patches - only a few items were listed when I checked for updates, though I'm not sure about this.

CBS.zip attached.
The CBS directory has 5 cab files that aren't included (they make the zip file greater than the 8 MB limit):
CbsPersist_20141001070535.cab
CbsPersist_20141001150330.cab
CbsPersist_20141007175022.cab
CbsPersist_20141007233433.cab
CbsPersist_20141113050230.cab
From my brief look at the log it looks like there are more registry keys that are missing/broken.

sfc /scannow reported no integrity violations.

Thanks.

The CheckSUR log shows this error...

Code:

Checking Package Watchlist
(f) CBS Registry Error 0x00000002 Microsoft\Windows\CurrentVersion\Component Based Servicing\PackageDetect  Failed to open store key

SFC/CBS shows the following error...

Code:

2014-11-12 21:02:30, Info                  CBS    Starting TrustedInstaller initialization.
2014-11-12 21:02:30, Info                  CBS    Fallback code servicing stack search path during setup...
2014-11-12 21:02:30, Info                  CBS    TI found cbscore.dll at: C:\Windows\servicing\0.0.0.1
2014-11-12 21:02:30, Info                  CBS    Failed to load Core DLL from path: C:\Windows\servicing\0.0.0.1\cbscore.dll [HRESULT = 0x8007007e - ERROR_MOD_NOT_FOUND]
2014-11-12 21:02:30, Info                  CBS    Failed to initialize CBS Core. [HRESULT = 0x8007007e - ERROR_MOD_NOT_FOUND]
2014-11-12 21:02:30, Info                  CBS    Ending TrustedInstaller initialization.
2014-11-12 21:02:30, Info                  CBS    Failed to initialize Trusted Installer. [HRESULT = 0x8007007e - ERROR_MOD_NOT_FOUND]
2014-11-12 21:02:30, Info                  CBS    Starting TrustedInstaller finalization.
2014-11-12 21:02:30, Info                  CBS    Trusted Installer core was not initialized.
2014-11-12 21:02:30, Info                  CBS    Ending TrustedInstaller finalization.
2014-11-12 21:02:53, Info                  CBS    Starting TrustedInstaller initialization.
2014-11-12 21:02:53, Info                  CBS    Fallback code servicing stack search path during setup...
2014-11-12 21:02:53, Info                  CBS    TI found cbscore.dll at: C:\Windows\servicing\0.0.0.1
2014-11-12 21:02:53, Info                  CBS    Failed to load Core DLL from path: C:\Windows\servicing\0.0.0.1\cbscore.dll [HRESULT = 0x8007007e - ERROR_MOD_NOT_FOUND]
2014-11-12 21:02:53, Info                  CBS    Failed to initialize CBS Core. [HRESULT = 0x8007007e - ERROR_MOD_NOT_FOUND]
2014-11-12 21:02:53, Info                  CBS    Ending TrustedInstaller initialization.
2014-11-12 21:02:53, Info                  CBS    Failed to initialize Trusted Installer. [HRESULT = 0x8007007e - ERROR_MOD_NOT_FOUND]
2014-11-12 21:02:53, Info                  CBS    Starting TrustedInstaller finalization.
2014-11-12 21:02:53, Info                  CBS    Trusted Installer core was not initialized.

I suspect that your system is beyond manual repair - and therefore suggest that you attempt a repair install of the OS
See the instructions here... Repair Install

Glad to hear it!
Good luck with it.