windows 7 update not working

windows 7 ultimate 64bit with service pack 1. windows 7 update not working it has a red x against it when I try to update I get the message (windows update encountered an unknown error code 800F900.) It has worked well before. I have tried system restore done several scans in safe mode. used windows update repair tool it found nothing wrong. I have tried some of the suggestions on the windows site none worked. any ideas please

Easy steps first
Try to boot the computer
Does it work now
No
Make and SFC scan
SFC /SCANNOW Command - System File Checker
no
Then download and use CCleaner to remove any updates that may be blocking updater

If you have an install DVD, you can try a repair install.
Repair Install

Please follow the Windows Update Posting Instructions and post the requested data

If the file is too large (8MB compressed), remove the older CBSPersist cab files until the final file is below the limit - you can always post them separately after zipping them. (the forum doesn't allow the upload of bare CAB files, for a number of reasons)

Please also post the C:\Windows\windowsudpate.log file

Here's the errors that CheckSUR found...

Code:

Unavailable repair files:
 winsxs\manifests\x86_system.data.oracleclient_b77a5c561934e089_6.1.7601.18523_none_c79350c499ca8542.manifest
 winsxs\manifests\wow64_microsoft-windows-ieframe_31bf3856ad364e35_9.4.8112.16555_none_e378e87db5384445.manifest
 winsxs\manifests\amd64_microsoft-windows-ie-internetexplorer_31bf3856ad364e35_9.4.8112.16561_none_a3d50080ecc2b05f.manifest
 winsxs\manifests\wow64_microsoft-windows-ie-internetexplorer_31bf3856ad364e35_9.4.8112.16555_none_ae387be72117bbc5.manifest
 winsxs\manifests\amd64_microsoft-windows-ie-internetexplorer_31bf3856ad364e35_9.4.8112.20666_none_a4639ebe05dbcedc.manifest
 winsxs\manifests\wow64_microsoft-windows-ie-htmlediting_31bf3856ad364e35_9.4.8112.16533_none_c71304894a6f9560.manifest
 winsxs\manifests\wow64_microsoft-windows-ieframe_31bf3856ad364e35_9.4.8112.16545_none_e383b869b5302854.manifest
 servicing\packages\Package_111_for_KB2982378~31bf3856ad364e35~amd64~~6.1.1.0.mum
 servicing\packages\Package_2_for_KB2925418~31bf3856ad364e35~amd64~~9.4.1.0.mum
 servicing\packages\Package_2_for_KB2957689~31bf3856ad364e35~amd64~~9.4.1.0.mum
 servicing\packages\WUClient-SelfUpdate-Core-AdmComp~31bf3856ad364e35~amd64~en-US~7.6.7600.320.mum
 servicing\packages\WUClient-SelfUpdate-Core-UIComp~31bf3856ad364e35~amd64~~7.6.7600.320.mum
 servicing\packages\Package_111_for_KB2982378~31bf3856ad364e35~amd64~~6.1.1.0.cat
 servicing\packages\Package_2_for_KB2925418~31bf3856ad364e35~amd64~~9.4.1.0.cat
 servicing\packages\Package_2_for_KB2957689~31bf3856ad364e35~amd64~~9.4.1.0.cat
 servicing\packages\WUClient-SelfUpdate-Core-AdmComp~31bf3856ad364e35~amd64~en-US~7.6.7600.320.cat
 servicing\packages\WUClient-SelfUpdate-Core-UIComp~31bf3856ad364e35~amd64~~7.6.7600.320.cat

I'll post a fix for these later - then we'll have to work on the other problems.

Found all but one file - and I've put out a call for that one...


I've uploaded a file - cjdaa.zip - to my OneDrive at Noel's OneDrive
Please download and save it.
Right-click on the downloaded file, and select Extract all…
Extract to the default location - which will create a new folder cjdaa in the same place.
Open this folder - there should be two folders inside it (Manifests, and Packages)

Copy the content of the Packages folder to the folder
C:\Windows\Temp\CheckSur\Servicing\Packages

And the content of the manifests folder (.manifest files) into this folder:

C:\Windows\Temp\CheckSur\Winsxs\Manifests

Now run the CheckSUR tool again (it may take a while)

Post the new CheckSUR.log file, and the CheckSUR.persist.log file.