I was away for a week and in that time no one used my Windows PC where ProSeries has been since 2018.

I've already tried to reinstall, full reinstall (change ProWin21 with -old), turn off Antivirus, and made sure Windows updates were up to date.

Internet connection is fine as I can login here, all usual websites are fine.

Only thing I can think of is my EFIN because I had to re apply here with IRS letter so just did that and waiting to see that be actioned. But that shouldn't disallow the program to start loading, right?