Kindly be advised we cannot cancel subscriptions or issue refunds on the forum.
You may cancel your Bitdefender subscription from Bitdefender Central or by contacting Customer Support at:

Thank you for your understanding.

Mozilla Thunderbird doesn't start with Bitdefender Free Edition on


I am using a freshly installed system Windows 10 Professionnel x64 Fr

Bitdefender Antivirus Free edition, Engine version 7.86614

Mozilla Thunderbird 78.5.0 (x64fr) same problem with previous release 78.4

Mozilla Thunderbird doesn't start - no error message

even in safe mode, no module activated, new empty profile

in Bitdefender, I added Exclusions for thunderbird.exe and profile directory

The only way to start Thunderbird is to set "Protection Shield" to Off in Bitdefender

Does anybody know what to do to solve this proble ?