I've uploaded a file - wubitsbfe.zip - to my SkyDrive at https://skydrive.live.com/#cid=93673...8FCEB92F%21485
Please download it, and extract the contained .reg file.
Right-click on teh extracted file, and select Merge.
You'll get a couple of warnings, and then hopefully a success message.
Reboot, and try Windows Updates again.