Suggestions:

1. turn off computer, turn back on try to log in, if that doesn't work

2. open Pro Series Tools Hub, select program problems, follow instructions, try to log in, if that doesn't work

3. right click on command prompt, select run as administrator, type chkdsk C: f, enter, try to log in, if that doesn't work

4. Completely uninstall ProSeries, reinstall by downloading from your My Pro Series, if that doesn't work, sorry, I have no more suggestions.

This is why I don't upgrade windows unless/until the new upgrade is over 5 years old. Too many issues on new upgrades. I am sticking with Win 10.