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How do I stop Thunderbird from freezing when I try to open a file attached to an email.

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When I open an attached file from an email I've received, the Thunderbird program becomes non responsive and I have to shut down the computer to restart Thunderbird to get it to work again. I'm running Windows 7.

When I open an attached file from an email I've received, the Thunderbird program becomes non responsive and I have to shut down the computer to restart Thunderbird to get it to work again. I'm running Windows 7.

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