KB3000850 Could not complete updates undoing changes

[pcts]

Hi there
I am looking for assistance. I am trying to install KB3000850 on a Windows 8.1 Pro x64 machine however when it installs - and restarts - I get message saying "we couldn't complete the update - undoing changes - don't turn off your computer".
The computer then loops and loops and loops (restarting,...... undoing changes.....restarting etc). I have to boot into safe mode to get it to stop.
Attached are the CBS logs after a first attempt and 2nd attempt. Can anyone assist me?
I have installed lots of other updates via Windows update and they work fine but not this one.
Here are the steps I have tried.
1. sfc /scannow in safe mode then a reboot - update retried - same issue (loop, undoing changes). Sfc said it could not fix all errors.
2. I ran the windows update troubleshooter - which found three issues and fixed two.
3. I updated the windows 8.1 update agent to the latest one https://support.microsoft.com/en-us/kb/3075853
4. Tried sfc /scannow - same as step 1.
5. Manually downloaded update KB3000850 and installed it. It installs as normal and then on the restart it goes working on updates as normal and then it restarts and same issue - loop - undoing changes - loop.
I'm not an expert at reading CBS logs currently so hoping someone has an idea what's going on.

CBS Logs (13MB) here
https://dl.dropboxusercontent.com/u/50745801/CBS.zip

 

[pcts]

Hi all

Just a quick update- I have ran a DISM cleanup restorehealth command on the machine which reported no issues. I then ran an SFC which reported no issues unlike the last time. However the update still gives issues - soon as PC restarts after what appears to be a successful install - it says it could not complete the update and is undoing the changes. I now get a error in the system log 0x800f0922 which Microsoft website says to resolve install this update KB 2975061 which I tried to install but its already installed.

Giving up at this stage just going to deny the update from installing in future.

 

[BrianDrab]

Hello and welcome

Due to the precise nature of your corruption, you will receive help from a user named LiquidTension. He's one of our senior trainees here who's in his final phrase of his studies and needs to gain some real world experience in specific areas of Windows Update. This means that he'll be assisting you, but that I will first need to double check and approve his fixes before he posts them to you. If anything this is a good thing for you because it means that you've got at least two of us watching over your thread, but it will unfortunately add a slight delay between each reply. I hope that you understand and can accept the need for us to train up new members in this way in order to carry on doing what we do here, however, if for any reason you object to this setup, I will happily take on your thread myself.

Thank you very much for your understanding. We'll be with you very shortly.

 

[LiquidTension]

Hi pcts,

Do you have a Kodak printer?

Please do the following in Normal Mode:

SFC /Scannow

• Press the Windows Key
  
  + r on your keyboard at the same time. Type Notepad and click OK.
• Copy the three bold lines below and paste into the Notepad document:
  
  sfc /scannow
  timeout /t 120 /nobreak
  copy %windir%\logs\cbs\cbs.log "%userprofile%\Desktop\CBS.txt"
  del %0
  
  
• Click Format. Ensure Wordwrap is unchecked.
• Click File, Save As and name the file sfcscannow.bat.
• Select All Files as the Save as type. Save the file to your Desktop.
• Locate sfcscannow.bat
  
  on your Desktop. Right-click the file and click
  
  Run as administrator.
• Upon completion, a file (CBS.txt) will be created on your Desktop. Attach this file in your next reply.
• Note: If the file is too large to attach, upload to a service such as Dropbox, One Drive or SendSpace and provide a direct download link in your next reply.