Using McAfee?

Yes, I'm using McAfee, but it is only installing an update right now, not before. I already disabled the anti spam function of McAfee and the possibility to scan the email attachments

I also tried removing and reinstalling the programme, but this doesn't help. It already has the emailadresses in it, so it isn't possible to completely start again from scratch

Start *Windows'* safe mode with networking enabled - win8 http://windows.microsoft.com/en-US/windows-8/windows-startup-settings-including-safe-mode - win7 http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode - XP http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/boot_failsafe.mspx

Still In Windows safe mode, start thunderbird in safe mode - http://support.mozillamessaging.com/en-US/kb/safe-mode

Does problem go away?

- If no, then problem is either: bug in Thunderbird, in your Thunderbird profile, your mail provider. Please post into topic the contents of Help | Troubleshooting | copy text to clipboard

- If yes, (still in Windows safe mode) ... start Thunderbird normally

   -- If problem is still gone, then cause is a program loaded during windows startup.  Possibilities include: antivirus SW, virus/malware, background downloads such as program updates
   -- If problem is NOT gone, then cause is likely a Thunderbird addon - eliminate them by disabling each one at a time in Tools | addons | extensions and restarting

- If results are unclear ... possibilities include temporary conditions such as contention from other running programs, downloads related to windows update, ...

Please let us know your findings.

Both windows and thunderbird in safe, thunderbird is working fine, when thunderbird is not working normally. I got two times an error that a script was not running and when I stopped these, it was working normally. I have a windows 8 update in the queue which fails to install

McAfee have release a problem update. Please contact McAfee support for assistance in correcting your McAfee settings. I have heard good things about their chat support today.

I have turned off Anti-Spam and TB v29 is still not responding.

I uninstalled TB v29 and reinstalled it and TB is still Not-responding.

Did you do https://support.mozilla.org/en-US/questions/994386#answer-558321 ?

I turned off Real time scanning of McAfee and the Not-responding problem went away right away. Now I have to figure out how to fix that problem

I ran TB v29 in safe mode and the Not-responding problem was still there. I then ran TB in normal mode and disabled all addons and TB still Not-responding.

@Tank645 Have you contacted McAfee for a fix yet. I am told a couple of minutes with their chat people and the problem is fixed.

My email is supplied by my cable supplier who also provides McAfee, so I tried to contact them first before trying to contact McAfee because I believe they are supposed to provide the tech support for the McAfee they provide. If I don't get satisfaction there, I'll have to try McAfee directly. When I tried to contact the cable's tech support earlier, the expected wait time was one hour, so I opted out of the cue at that time as I had other things I had to do. I'm going to try them again now. However, in the past when I had trouble with Thunderbird connecting to the internet, they wouldn't provide tech support because they said they didn't provide service for Thunderbird. But I'll try again and I'll let you know what comes of it.

I have now been in touch with my internet supplier who supplies the McAfee program and the changes they made did not fix the problem. Only shutting down real time scanning has done that. They said they'd have their McAfee experts contact me in the next few days to try and resolve the problem. So in the meantime, I have shut off real time scanning so I can read my emails with out becoming Not-responding.

regardless of who is supposed to do support, I don't think the McAfee chat folk are to worried.

One person did come back and say all they changed was a setting to scan programs and documents only

Today my internet support technician contacted me regarding the Not-responding problem I was having as a result of Thunderbird v29 clashing with McAfee causing me to have to shut down real-time-scanning in order for Thunderbird to operate properly without locking up.

The technician told me I am using the 12x series of McAfee ie: 12.2, 12.2 etc. He said that McAfee was aware of the problem with Thunderbird and would likely provide a fix with series 13x when it comes out in the fall. However, he said there was a work around to fix the problem.

He explained that Thunderbird has a built-in email scan that can't be disabled and the problem arises because both McAfee and Thunderbird are trying to scan the emails at the same time and the answer is to stop the redundant scanning of emails by McAfee not to shut off real-time scanning.

The procedure to shut off real time scanning of emails is as follows: Open McAfee Security Center. Click on navigation at the top right, then click on Features in the window that opens up. Then click on Real-Time Scanning. Then click on settings. In the drop down window that opens up un-check Email attachments and click apply. Then close everything up.

I made a few selections around in Thunderbird and it did not become Not-responding. If there is any change on that I'll report back about it here but on first examination it appears to have fixed the problem.

I hope this is of help to others because it sure was frustrating for me trying to use Thunderbird the way it was operating.

sk8ter1986, what version of Thunderbird are you using when you see this problem?

Tank345,

Thanks for this detailed information from McAfee.

Do you see this problem when running the release version of Thunderbird, 24?

And, did they give a name to or describe this so called scanning that Thunderbird does? Are they talking about scanning when an attachment is downloaded? Or only when attachment is opened?

I used the latest version of Thunderbird. I run another virusscan next to McAfee and it found a virus after removing this, the problem was solved.

sk8ter1986, thanks for posting this info. If McAfee found this virus in your Thunderbird profile it would actually be a bad thing, because it should not be scanning your profile.

If you look at the McAfee logs, in which directory did McAfee find the virus?

I'm sorry I won't be able to answer this question, two weeks after the Thunderbird problem was solved my laptop crashed and the hard drive seems to be broken :(