The box that pops-up says “Logon - mail.tesco.net. Please enter your user name and password for the following server”
The password box is auto-completed.
I have now noticed that if I click on the OK box quite quickly it leads to the “Outlook Express not responding” situation as described above.
If I leave it without clicking, the program opens up as usual, but once it is open if I click OK in the Logon window, it (the Logon window) disappears and quickly returns again. If I click Cancel all is well.
So I have found a way around the original problem, but why is it behaving like this ???
Yes, I do use Avast Mail Scanner.