No, and sorry that didn't work for you. I actually had occasion to use that identical fix procedure on a Windows 7 laptop yesterday and it worked perfectly for me. The only thing that I might have done slightly different is after using the CleanUp tool to remove the 4 client and rebooting, and then using the windows update utility to re-install the client, I did reboot again at that point prior to attempting to apply the security update to the new .net4 client install. Other than that I don't think I did anything different.