Hi, Starting less than a week ago Thunderbird has been running slowly. Sometimes it's quite noticeable and sometime not so much. E.g. clicking on a different folder sometimes happens immediately and sometimes takes maybe 4 sec. to display the folder. Clicking on a message sometimes displays it immediately but can take 7 or 8 secs. to display. Receiving messages seems normal and I haven't noticed slower speeds sending. Clicking on Reply for a message can take several seconds, and dragging a message to a different folder can do the same. Once I'm editing a message the edit speed is normal with no slow down and the address book and editing filters are both fast. I didn't make any changes to Thunderbird, this just started happening on it's own. I'm running Thunderbird ver. 128.4esr (32-bit) on a windows 10 desktop PC using POP to access messages. I ran Compact on all the folders to no benefit. I don't know what else to try. Please let me know how to correct this or figure out what's going on. Thanks, Mike