Illegal Dealer That Moved To Mexico

[ddouglass]

David the original message you got that the registration number was a mismatch could not be caused by .net Framework. The only thing that can cause this is the file where that information is stored was corrupted by loss of data in that spot on the hard drive. Since you stated that you have been having trouble with the hard drive I believe that is the cause of your original problem.
When you try to install it is the message you get back from MTU that it is already installed on 1 computer or that your registry code is locked or disabled?
What Skybird is trying to say is do a System Restore (Windows function) to a date/time prior to all of this happening. It may or may not work but is worth a try.
And actually if you are going to update .net Framework from 1.1 up to 3.0 then you also needed to install 2.0 also. They are all inter-related and only update or add some of the features.