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My problem is that I can’t get into Thunderbird because each time I start it up I’m presented with a window that says "System Integration" (Not Responding)" and I have no way of making progress – all I can do is use Task Manager to exit TB.

The “system integration” window first appeared a few days ago and initially I was able to dismiss it by choosing the “Skip integration” option. Today was the first time it became unresponsive. No changes have been made to the system and TB should be up to date – though, not being able to open TB, I can’t check the version number (probably esr).

I have used TB for many years and have it installed on two PCs, both running on Windows 11. It’s working as normal on the other computer.

I’ve tried rebooting the computer, to no effect. I’ve also tried to open TB in troubleshooting mode but can’t get past the "System Integration" (Not Responding)" window.

It’s been a couple of months since I backed up so I’m really hoping there will be a solution that preserves all my emails, address book and calendar.

I’d be very grateful for any suggestions.

SHello Sometimes, on my iMac APPLE (OS Tahoe), THUNDERBIRD stops opening (message system: not responding ("ne répond pas" in French) There is no problem when launching the application, but issues arise later when returning to it after using other applications (Word, Excel, videos, etc.), THUNDERBIRD tourne en rond et ne s'ouvre plus. I have to close the application (via my Mac's system settings) and relaunch it for it to open normally again. I would appreciate any help if someone has experienced the same kind of issue. VAJP

I wanted to export my address book from my Windows10 PC, after a while I got an error message, something happened during the attempt. Since then I cannot start Thunderbird anymore. The program does not respond. So I can't find the Thunderbird version.