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TB slow to download emails, now locks up when I click to open one

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Other than being slow to download my emails now for a few months, TB was performing well until a week or so ago. Now it also won't open the downloaded email when I click on it and the TB freezes up so I can't close it out. I have tried restarting computer multiple times and it works for one or two emails that I can open and then starts freezing up again. Makes using it almost impossible. I have security Windows 11 Defender only and have had it the entire time when it also worked well.

Other than being slow to download my emails now for a few months, TB was performing well until a week or so ago. Now it also won't open the downloaded email when I click on it and the TB freezes up so I can't close it out. I have tried restarting computer multiple times and it works for one or two emails that I can open and then starts freezing up again. Makes using it almost impossible. I have security Windows 11 Defender only and have had it the entire time when it also worked well.

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Try to start Windows 11 in safe mode with networking enabled.

Does the problem go away?

Windows safe mode disables anti-virus software. This is a troubleshooting step, not a solution.

I followed the steps to start Windows 11 in safe mode with networking enabled. I opened in Safe Mode with Networking enabled, then I opened Thunderbird, but I got messages that "Failed to connect to the server Microsoft 365". It would do nothing beyond that, not even close Thunderbird so I had to restart the computer to close out TB. I retried TB but same problem persists. Ann

Do you have a wired connection to the internet? Networking with safe mode requires a wired connection. WiFi does not work.

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