Success??? I had a copy of TS2020 on a external ssd. Fired it up. Sim ran fine until I clicked Workshop... Crash,PC Restarts.Uninstalled/ reinstalled Steam and sim. Deleted all workshop files as you all and Steam had suggested plus a few other things they suggested. Back to original drive .Same results Crash,PC Restarts. Played sim on external drive with workshop files deleted game ran fine. Clicked workshop no problem. Go figure. . Once again Thank you all for your help.