Windows 7 Update Error 80070002

Hi,
Background: I've been doing my research on this for a while, but have yet to find a solution. It seems to be a common problem with varying solutions depending on the user. I have a basic level of understanding, but may need some hand-holding on specific tasks.

Windows 7 Professional 64bit

Problem: My windows update isn't updating and has given me error code 80070002 every time I look for updates. I've run some of the recommended windows fixes with no luck. There is no list of installed updates either.

Related info: sfc /scannow does not work. I cannot restore to previous restore points. It seems I cannot do repair installs, only a full clean install (obviously I would like to avoid this). I have run SFCfix and there are no errors (see below box). I have also run chkdsk and there are no errors.

Any further information needed?

Help!

SFCFix version 2.4.4.0 by niemiro.
Start time: 2015-06-07 10:50:35.753
Microsoft Windows 7 Service Pack 1 - amd64
Not using a script file.




AutoAnalysis::
SUMMARY: No corruptions were detected.
AutoAnalysis:: directive completed successfully.




Successfully processed all directives.
SFCFix version 2.4.4.0 by niemiro has completed.
Currently storing 0 datablocks.
Finish time: 2015-06-07 10:51:56.120
----------------------EOF-----------------------

The following Key appears to be missing from the registry, according to the CBS.log...
\Machine\Software\Microsoft\Windows\CurrentVersion\SideBySide\Winners\amd64_microsoft-windows-kerberos-adm_31bf3856ad364e35_none_5c31f57aa4e48c0a\6.9"

I'm not sure why CheckSUR didn't find and flag it

However, the key doesn't exist in my machine either, although there is a related entry elsewhere. There are no other versions of that key within the stated hive that I can find, so I wonder what's going on...

Perhaps that is the source, rather than the target, in this instance...

Please open an Elevated Command Prompt, and run the following commands

REG LOAD HKLM\COMPONENTS C:\Windows\System32\config\COMPONENTS
REG QUERY "HKLM\COMPONENTS\DerivedData\VersionedIndex\6.1.7601.18766 (win7sp1_gdr.150217-1551)\ComponentFamilies\amd64_microsoft-windows-kerberos-adm_31bf3856ad364e35_none_5c31f57aa4e48c0a"
REG UNLOAD HKLM\COMPONENTS


post the results.

Here are some instructions to make life easier :)
1) To open an Elevated Command Prompt Window (the ECP window), click on Start, All Programs, Accessories – then right-click on Command Prompt, and select Run as Administrator. Accept the UAC prompt.
2) To run the commands easier, highlight the block of commands, and right-click on the highlight – select Copy. In the CP Window, click on the black/white icon at top left – select Paste. The commands will run but may not complete the last command, so hit the Enter Key once.
3) To copy the results... click on the Black/White icon in the top left, and select Edit... 'Select All', and hit the Enter key - then use Ctrl+V or r-click+Paste to paste it into your response.

Hmmm - that's exactly what I was expecting to see - and gives me no clues

I'm going to se if I can get some help from someone more expert with the registry than me!

Nothing yet - my guru tends to be very busy, so it may take another day or two

Nothing yet - he may be on holiday... I'll see if I can get someone else interested.