Hi, Just converted to Windows 11 this passed week and downloaded '''Microsoft PC Manager''' to assist with disc cleanup. This last piece of information is highly significant I think. I believe one of my initial runs of PC Manager may have deleted some data from 4 of my 5 email addresses that are generally used with Thunderbird mail. The reason I say that is that 4 emails forced a login with full name, email address, password and IMAP default settings when I attempted to log in with each affected email separately yesterday. '''Not really looking for any help''' as I think I shot myself in the foot unwittingly with PC Manager. More a heads up for anyone who uses disc cleaners and decided to switch to a Microsoft design that isn't really intended for the masses, - or people who have used PC's for 30 years! Oh well, live and learn ...