chnmanz

I've just installed ESET Internet Security 10 and then installed Mozilla Firefox and Thunderbird, and had issues with internet pages and couldn't even install add-ons in Firefox, and email couldn't be sent/received. I had Smart Security which had expired Nov 2016 so I remember I had the same problem a long time ago. What solved it for me was I had to go into ESET 'Advanced Setup', then "WEB & EMAIL", then click on the + next to "SSL/TLS", then scroll down to "ROOT CERTIFICATE". Disable (move the tick to the right), then "OK". Now put the tick back to the left, then "OK". After this is done, reboot computer and see if it now works properly. I had to do this to other user accounts also, and I think I had to temporarily change them from a standard account to administrator account until the changes/reboots were done.

I've just installed ESET Internet Security 10 and then installed Mozilla Firefox and Thunderbird, and had issues with internet pages and couldn't even install add-ons in Firefox, and email couldn't be sent/received. I had Smart Security which had expired Nov 2016 so I remember I had the same problem a long time ago. What solved it for me was I had to go into ESET 'Advanced Setup', then "WEB & EMAIL", then click on the + next to "SSL/TLS", then scroll down to "ROOT CERTIFICATE". Disable (move the tick to the right), then "OK". Now put the tick back to the left, then "OK". After this is done, reboot computer and see if it now works properly. I had to do this to other user accounts also, and I think I had to temporarily change them from a standard account to administrator account until the changes/reboots were done.

As itman said above, this is what worked for me. I have ESS 9 and it is under Setup, Advanced Setup, Wed and Email, SSL/TLS, Root Certificate. Where it says "Add the root certificate to known browsers", disable, then "OK", then re-enable and "OK". I have backup images and narrowed it down to one of the recent Windows Updates that must have changed something that ESET had set up. Disabling and re-enabling as mentioned puts it back and the message should go away. Also, on my computer, it was to do with Thunderbird (email program). I have three user accounts on my computer, and this message was only happening on the account I use Thunderbird on.