I had similar issues trying to efile my federal forms (I'm not doing state). In Windows 10 Pro, I tried everything they could think of and spent 6 to 8 hours trying to get the updates to work with multiple calls to Intuit support. Still no success. I switched to an old Windows 7 PC that I have and everything went smoothly. TurboTax even has a window that pops up telling you that you need to switch from Windows 7 to Windows 10 because Windows 7 isn't being supported anymore. But don't do it because you won't be able to efile.
