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Mozilla Thunderbird doesn't start with Bitdefender Free Edition on

edited January 2022 in Antivirus Free

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