I am willing to provide any logs to help identify and solve the problem. I tried uninstalling Firefox and then reinstalling a new copy into a different directory. The server might not be sending the appropriate intermediate certificates.Īn additional root certificate may need to be imported. The major sites just started showing the This Connection is Untrusted message. The certificate is not trusted because the issuer certificate is unknown" I also have: In addition to the: "(site name) uses an invalid security certificate. Google Chrome: When prompted with the not trusted certificate prompt accessing the NSM logon page, select Proceed anyway. Click Add Exception, Confirm Security Exception. The certificate is not trusted because the issuer certificate is unknown" so I tried to delete the cert8.db file but the problem is still here. Mozilla Firefox: When prompted with the untrusted site page when accessing the NSM logon page: Click I understand the risks. It seemed to disappear but after a few minutes the problem came back.īut the only problem I have which is addressed in this guide is the "(site name) uses an invalid security certificate. I am on windows 8.1 pro, with windows defender on and malwarebytes pro. Do NOT click the Reset button on the Safe Mode start window. I also tried looking for malware's as I am aware that some malware's can cause such problems but none of my tools picked anything. Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance). I'm trying to use Firefox 39.0 but I get: "sec_error_bad_signature" and "This Connection is Untrusted" in any site (even and about:addons)Īt first the "sec_error_bad_signature" error was shown when I tried to surf and then after cleaning cache, cookies, refreshing firefox, restarting without add-ons and finally re-installation of firefox the errors changed to: This Connection is Untrusted
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