Windows Update for Microsoft .NET Framework 4 Fails

For quite a while I have not been able to get the Microsoft .NET Framework 4 update to work on a WIndows 7 64bit box. So if you experience the same issue with clients this might be helpful.

In short the fix is:
“go to control panel click uninstall programs, find >Net framework 4 client profile file , then click right and do repair file ,install part worked fine right after”

Full detail here:
http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_update/windows-7-error-code-66a-cant-install-kb2160841/11b6b2c5-e780-4343-9de5-ffa4619f45c4