Same problem. I get to the 2019 Turbo Tax Updater screen that shows less than 2 minutes to completion, but download doesn't complete, and I have to Ctrl-Alt-Delete out of the screen. Can't download the State Tax Program either. I have completed all Windows 10 updates and tried uninstalling and reinstalling Turbo Tax, shut down the anti-virus software, all to no avail. I spent 2 hours on the phone with their tech support and nothing worked. They say that their IT Department is working on a fix and they will send out a patch. We'll see, Frustrating!
