Everything slow down on Win8.1 but not on Mac

A few days ago my TBird on my Win8.1 machine has slowed to a crawl. It takes forever to download emails, to load the emails to read, send emails on the junk e-mail folder, etc. Sometimes I get an error message saying that a script is not working and ask if I should stop it.
I updated and reinstalled TBird, but it does not help. I restarted in safe mode, but it does not help.
I've worn the profile more on my Mac, where I also installed TBird and everything works fine there.
So this seems to be a problem specific to Windows. Is anyone else seeing this? Anyone know what to do about it?

I don't know where exactly it in McAfee (he has made mistakes of slow and causing Thunderbird script more than a year. They release fix after fix) but there is an option (I think the real-time shield) to scan documents and programs instead of everything. I have been informed by those who have had success with the help of McAfee that you change to a completely back to normal

Tags: Thunderbird

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