After opening Thunderbird it is fast for about 30 seconds and then becomes really slow. Typing a new email makes the typed letters appear a few seconds after typing them. Selecting a few emails in my inbox takes half a minute. Thunderbird is regularly 'non responding' for a few seconds. Even moving through the menu bar is slow! It takes a few seconds for the mouse to catch up! The rest of my laptop seems ok, it is just thunderbird which is slow. I have tried to start Thunderbird in Safe-mode, no difference. I have tried to start the laptop in safe mode, no difference. I have tried to start the laptop and thunderbird in safe mode, no difference. I always empty my junk and trash and have compacted folders. All my 6 configured accounts are setup as IMAP. I really don't want to make my inboxes smaller as I have a regular need for the old information. Please help! Kind regards, Iwan