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== McAfee ==
McAfee has had major problems with Thunderbird over the years, causing crashes and poor performance, "Not Responding", "Unresponsive Script", and other issues. <small>(For example [http://forums.mozillazine.org/viewtopic.php?p=13985921#p13985921], [http://forums.mozillazine.org/viewtopic.php?p=14013179#p14013179], [http://forums.mozillazine.org/viewtopic.php?p=13495577#p13495577], [http://forums.mozillazine.org/viewtopic.php?p=12678533#p12678533], [http://forums.mozillazine.org/viewtopic.php?p=13483493#p13483493], [http://forums.mozillazine.org/viewtopic.php?p=13127165#p13127165], [http://forums.mozillazine.org/viewtopic.php?p=13846427#p13846427], [http://forums.mozillazine.org/viewtopic.php?p=13482389#p13482389 (in 2013)], [https://support.mozilla.org/en-US/questions/1021448#answer-649815],
[https://support.mozilla.org/en-US/questions/999657],
[https://support.mozilla.org/en-US/questions/1041740],
[https://support.mozilla.org/en-US/questions/1050988],
[https://support.mozilla.org/en-US/questions/1051488],
[https://support.mozilla.org/en-US/questions/1054542], {{bug|592303}}. )</small>
We recommend you do all of the following:
* Disable/delete '''McAfee Anti-Spam Thunderbird Extension''' in Thunderbird | Tools | Add-ons | Extensions (It is safe to remove the add-on, and is absolutely not needed to have excellent virus protection.)* Disable email attachment scanning in McAfee (it individually scans all emails which slows down Thunderbird) - '''Uncheck Email attachments under Real Time Scanning > Settings > Scan these attachments and locations'''* Disable scanning of Thunderbird files and folders in McAfee (by default McAfee is NOT supposed to scan them):*# Right In Windows, right+click on systray the McAfee iconin Windows notification area (aka system tray), or start McAfee from start menu
*# "On-Access Scan properties ..."
*# "All processes", "Exclusions"
*# "Exclusions ..."
*# Add the "Thunderbird" and [https://support.mozillamessaging.com/en-US/kb/profiles#w_how-to-find-your-profile "Thunderbird Profile"] folders and subfolders. Folder names '''must''' finish with a backslash. '''NOTE, if you have customized profile or account locations for mail, then you must exclude your custom locations.'''
* Please write/Call call McAfee support to inform them of your difficulty. They can't fix what they do not know about.
If none of the above helps and you suspect McAfee is the cause then you may need to remove McAfee using the [http://service.mcafee.com/FAQDocument.aspx?id=TS101331 McAfee Consumer Products Removal tool], and seek different antivirus software.
