Certificates and Thunderbird

Avast Free Antivirus / Premium Security
1

Hi,

How do I do this https://support.avast.com/en-us/article/Troubleshoot-invalid-email-certificate, fix the SSL errors and export a certificate with the new version of avast?

2

→ https://forum.avast.com/index.php?topic=224906.0

3

thank you, I followed it, imported it into TB, but, getting this message “This certificate is already installed…”

4
  • Which Avast…? (Free/Pro/IS/Premier)
  • Which version…?
  • OS…? (32/64 Bit…? - which SP/Build…?)
  • Other security related software installed…?
  • Which AV(s) did you use before Avast…?
  • Which version of Thunderbird…?
5
  • Avast… Free
  • Which version…? 19.1.2360 (build 19.1.4142.454)
  • OS…? (32/64 Bit…? - which SP/Build…?) W10 64 bit, ver 1803, build 17134.523
  • Other security related software installed…? malwarebytes
  • Which AV(s) did you use before Avast…? none
  • Which version of Thunderbird…? 65.0b4.
6
  1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
  2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions…!!)
  3. Reinstall Avast with the downloaded installer from point 1.
  4. Reboot.

PS: Regarding Avast & Malwarebytes, see: https://forums.malwarebytes.com/topic/200324-exclusions-for-avast-users/

7
imported it into TB, but, getting this message "This certificate is already installed..."

You need to delete the old certificate from Thunderbird’s certificate manager first, then re-import.

8

removed them both, still getting that message. Closed and reopened TB, got the same thing.

9

See Reply #5.