Start Windows in safe mode. Is Thunderbird still slow?

I started windows in safemode and deleted some mails the problem did not show now !

JoopV said

I started windows in safemode and deleted some mails the problem did not show now !

This suggests antivirus or some other software that loads during Windows startup is the cause.

Wayne Mery said

Start Windows in safe mode. Is Thunderbird still slow?

I started windows in safemode and deleted some mails the problem did not show now !

Wayne Mery said

JoopV said

I started windows in safemode and deleted some mails the problem did not show now !

This suggests antivirus or some other software that loads during Windows startup is the cause.

I changed already from McAfee to Bitdefender and nothing changed, Maybe its usefull to reduce the large startup list in this PC ?

I changed already from McAfee to Bitdefender and nothing changed, Maybe its usefull to reduce the large startup list in this PC ?

JoopV said

I changed already from McAfee to Bitdefender and nothing changed, Maybe its usefull to reduce the large startup list in this PC ?

Only if the slow deletes are happening shortly after Windows startup.

Rules of thumb:

• Only run one antivirus program
• Only run one malware program
• Some AV and some malware programs do email scanning - it is recommended that you turn this OFF (worst case, make certain you aren't running it in both) [1]
• Make an exception for your Thunderbird profile data directory in these programs [2] (These programs already should NOT scan the TB profile, but failures happen)

[1] https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues [2] https://support.mozilla.org/en-US/kb/profiles-where-thunderbird-stores-user-data

Thanks a lot for your help so far Wayne ! I have trouble to simply understand some of the things you wrote. But to solve the issues with Bitdefender I just have asked them to provide customercare on my thunderbird problem. I hope they will be able to tell me which settings I might adjust to avoid this problem. As it is night in Holland now the answere will take some time. I let you know about the progress. Thanks again for your support

JoopV said

Thanks a lot for your help so far Wayne ! I have trouble to simply understand some of the things you wrote. But to solve the issues with Bitdefender I just have asked them to provide customercare on my thunderbird problem. I hope they will be able to tell me which settings I might adjust to avoid this problem. As it is night in Holland now the answere will take some time. I let you know about the progress. Thanks again for your support

I think I found the solution for my problem. Without me knowing it Bitdefender internet security put an Add-on in Thunderbird called Bitdefender antispam Toolbar. After I stopped this Add on, Thunberbird seems to work fine ! I hope it keeps on working fine after this simple change. You helped me a lot thanks again for that