Uninstall step from 2016 to 2017 was taking hours. I have now tried to RESTART the computer and this, too, is taking hours. I have already upgraded on another computer with same internet speed successfully. Can I leave it in the RESTART mode to see if it will clean up after itself? Again, we are talking HOURS. Windows 10 does not like interruptions and I do not want to have to reinstall the O/S. Please advise if I can just wait this out???