Look again at anti virus software, reboot your computer into safe mode with networking. This loads only the very basics needed to start your computer while enabling an Internet connection. Click on your operating system for instructions on how to start in safe mode: [http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-including-safe-mode Windows 8], [http://windows.microsoft.com/en-us/windows/start-computer-safe-mode#start-computer-safe-mode=windows-7 Windows 7], [http://windows.microsoft.com/en-us/windows/start-computer-safe-mode#start-computer-safe-mode=windows-vista Windows Vista], [http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/boot_failsafe.mspx?mfr=true" Windows XP], [http://support.apple.com/kb/ht1564 OSX] ; Unfortunately one of the key aspects of anti virus solutions is they are almost impossible to actually "pause" and fail almost exclusively to disable when they say they are and uninstall when you tell them to.

Thank you very much. As soon as I started Thunderbird in Windows Safe Mode all outstanding e-mails downloaded and after a normal reboot into Windows Thunderbird is working without a problem. Once again Thanks, AGMNS