I have the same issue and TT support could not help. Actually, I had same issue about 2 weeks ago, tried the MS fixes TT support sent me, running sfc and a file fix. That DID work. But now the issue is back and those fixes DO NOT work now. I believe the TT program is causing the Windows installer service to lock up. Also, I have installed TT on ANOTHER computer, with the same results. It MAY be a windows issue, but TT is creating the issue.
