Recently, I needed to reset my 'Main work Computer' to factory default. Before I wiped everything I saved all the messages addresses etc via Mozback, I then transferred all the info to the laptop to see if it works, which it does. After this I re-installed Thunderbird to my recently reset computer, I used Mozback up to restore all the information as set like it was previously. It was working great for about a day then only recently I came across this problem: Thunderbird still receives mail & I can read it, however when I try 'compose new message', 'reply' or 'forward' a message the new box will open up ready to type into except it freezes & it says not responding. I have it on my laptop & its working fine for now but I'm wanting it to work on the Main Computer!! What should I do??