Thanks. Open the Run box again and type in: rstrui.exe and click OK.
System Restore will open. Select the option to choose a different restore date, if you see it, and click Next.
Put a checkmark in the box labeled Show More Restore Points if visible.
Select a restore date just before midnight, January 6 and click Next, then Finish.
Continue with the warning about disturbing the restore and it will run.
This will set Windows system files back to the way they were when you were able to log in to mail.com
It won't disturb your data files.
I'm a little perplexed myself with one website telling me the mail.com server isn't working yet I'm able
to create a mail.com account and send myself a test mail.