This is rather interesting, this is the first time I have seen this error without a certain file being corrupt!
Software Distribution rename
- Click Start -> Type in CMD in the search -> Right click on cmd.exe and choose Run as Administrator
- Entre in the following commands:
net stop wuauserv
ren %SystemRoot%\SoftwareDistribution\Download DL.bak
ren %SystemRoot%\SoftwareDistribution\DataStore DS.bak
net start wuauserv
Once completed please try and run windows update again.
if WU still fails please run SFC /SCANNOW and upload a new log.