The updater requires the .net framework stuff. If it's not present and current, it updates the .net framework in the background with absolutely no indication it's doing so. Therefore, give it 15-20 minutes. If after 30 minutes nothing happens, uninstall the TTX program and uninstall all versions of the .net framework.
Then run windows update over and over until no more updates are available. Then you can re-install the TTX program.
