Did you know freezing is not crashing and using the incorrect term is a sure sign you will have difficulty finding answers. When something is not responding and you try and search using the word crash nothing that is returned is relevant. When you post in this forum and say crash, you are asked for crash id references that you can not offer because you are not crashing. You are hanging or not responding.

Thunderbird is not responding, now as you have deleted a lot of mail, it might be it is still processing that. Or it could be your antivirus is messing up Thunderbird because it is trying to make major changes to files stored on the hard disk. Do you have an exception in your antivirus for the Thunderbird profile folder?

Hello: Thank you so much for replying to my post. You are absolutely correct, I should have stated that Thunderbird will freeze up, and not necessarily an actual crash. I have explored my anti virus to see if the anti virus software could be blocking Thunderbird. I am still looking though to see if it actually is. And too all I might have to do is give Thunderbird more time to completely process deleting a large amount on old emails, which I admit I should have stayed on top of that a while ago, not let that build up so much. I really do not know what to ask for, except have other people gone through a similar situation and what did they do ? Thanks so much. Sam

Anti-Virus would need to be set up to not scan anything in the Thunderbird profile folders. Otherwise they can any file that gets opened.

It depends upon where you got the Thunderbird installation, but if you got Thunderbird from this location:

• https://www.thunderbird.net/en-US/thunderbird/all/

Then this is the location of the 'Thunderbird' folder you need to set up as exempt from scanning and then it should not scan anything it contains. C://Users/username/Appdata/Roaming/Thunderbird

After you deleted a load of emails from say 'Inbox', I would recommend you compact the 'Inbox' to remove all old traces of deleted or moved emails.

• Right click on Inbox and select 'compact'

It's basic housekeeping and required maintenance, reduces files size and helps to reduce the risks of corruption. Recommend you do not use the folder whilst this is in operation, it usually only lasts a few seconds and do not exit Thunderbird if compacting is in progress.

Typically, Inbox, Drafts, Junk/Spam are the folders that get the most action when it comes to deleting or moving mail, so a regular manual compact on those folders should help alot.