Thanks for the update, but doesn't seem to be much use for Windows 7 users. I no longer have WU problems on either of my W7 machines now after carrying out a lot of tweaks and following the helpful advice given in these and other forums (or should it be fora?) but if I did have a problem and followed the troubleshooter, it seems to take me through the same old steps of Network Troubleshooter and Windows Update Troubleshooter and then advise Reset or Reinstall Windows if these steps don't work.
Nothing new there then - not Microsoft's finest hour.
Merry Christmas to all!