This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Thunderbird Not Responding Windows 10

aldago
aldago
more options

Thunderbird 78.10.1 (64-bit) often stops working and I get the message in Thunderbird "not responding". Let it sit for a 15 or 20 seconds and it corrects itself and works for a while. In the meantime, I keep getting notifications from Microsoft's Application Compatibility Assistant that a program will cause System problems on Windows 10. Since I only get lots of "not responding" from Thunderbird, I assume Thunderbird is causing the notification. I'm using Windows Pro Version 20h2 (OS Build 19042.928) Suggestions??

Thunderbird 78.10.1 (64-bit) often stops working and I get the message in Thunderbird "not responding". Let it sit for a 15 or 20 seconds and it corrects itself and works for a while. In the meantime, I keep getting notifications from Microsoft's Application Compatibility Assistant that a program will cause System problems on Windows 10. Since I only get lots of "not responding" from Thunderbird, I assume Thunderbird is causing the notification. I'm using Windows Pro Version 20h2 (OS Build 19042.928) Suggestions??

Chosen solution

I also get the "Not Responding" message quite often when using Thunderbird. It goes dead for 20 seconds or so quite regularly. It happens on two computers, both using Thunderbird 78.12.0 (64-bit) on Windows 10 Pro 21H1. These are fast machines. One is an XPS 15 9570 6-core i7-8750H with 32GB of RAM and 2TB SSD. The other is a Ryzen 9 3950X 16-Core desktop with 64GB of RAM and 4TB SSD.

When I edit my advertising email message filter it can take minutes to open up and minutes to switch windows again. I get a lot of ads in my inbox so the filter list keeps growing. I can no longer maintain the list using the GUI.

I've been using Thunderbird for over a decade, but I'm looking for something else to use now that it's become so slow to be unusable.

Read this answer in context 👍 0

All Replies (3)

timt70
timt70
more options

Chosen Solution

I also get the "Not Responding" message quite often when using Thunderbird. It goes dead for 20 seconds or so quite regularly. It happens on two computers, both using Thunderbird 78.12.0 (64-bit) on Windows 10 Pro 21H1. These are fast machines. One is an XPS 15 9570 6-core i7-8750H with 32GB of RAM and 2TB SSD. The other is a Ryzen 9 3950X 16-Core desktop with 64GB of RAM and 4TB SSD.

When I edit my advertising email message filter it can take minutes to open up and minutes to switch windows again. I get a lot of ads in my inbox so the filter list keeps growing. I can no longer maintain the list using the GUI.

I've been using Thunderbird for over a decade, but I'm looking for something else to use now that it's become so slow to be unusable.

christ1
christ1
  • Top 25 Contributor
more options
Thunderbird 78.10.1 (64-bit) often stops working and I get the message in Thunderbird "not responding".

What is your anti-virus software?

john.rovcom
john.rovcom
more options

I have checked that TB is on the exception list and is therefore not scanning incoming emails but it is still slow and still consistantly shows "Not Responding".

What can be done about this, it is extremely annoying and time consuming.

John Owles