Nothing
Use the fix, reboot
then run sfc /scannow from the command prompt, reboot
then reinstall .NET through windows update.
They should all work
If they still don't, and if clearing the catroot/catroot2/software distribution folders doesn't fix it, then you're heading for a rebuild of the system anyway.
Generally speaking by the time you've got where you are now, that tool is the last option before starting again with a clean system. Nothing ventured....
Last edited by Milo Minderbinder; 1st Sep 2012 at 17:15.