Responds very slowly. I get an error no longer - unresponsive Script / Message CAUSE: McAfee

In the last week or so, my Thunderbird account began to go very slowly and displays a message at the top - is unresponsive.
The program then hangs or I have to stop him going out.
It worked well for the first two months, but for some reason that it started his.
I'm not very computer and to my knowledge have not changed the settings on the computer.
I used Mozilla since Netscape has been abandoned and did not have this kind of problem before. Firefox seems to work very well.
Any help will be greatly appreciated.

Sounds like a lot of McAfee antivirus

See https://wiki.mozilla.org/Thunderbird: test: Antivirus_Related_Performance_Issues #Solutions_for_Antivirus_Software

Tags: Thunderbird

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