Try this..........disregard the error code....what we are trying to do is delete old data, then proceed with new data.
http://windows.microsoft.com/en-us/windows/windows-update-error-80070002#1TC=windows-7
After doing the above, use system restore to go back to a good point in time.
Repeat above.
Search for new updates and install them one at a time, researching any error codes and correcting before moving on to the next one. Don't forget to re-start when asked to.
Can be a real PITA, but I have been successful using this method.
Windows Updates.........huh, who needs 'em.....LOL
P.S. you do have an image in case of major screw-ups, don't you. Nothing like being able to go back to square one when needed most.
Harold