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Insecure Connection on all browsers, but primarily Firefox

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  • 1 有這個問題
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  • 最近回覆由 cor-el

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Title is pretty self-explanatory. I had been hit by a huge virus that slowed down my computer and even disabled my antvirus. Before and after cleaning the computer up, every time I try to google search, it brings me to the "Insecure Connection" page. YouTube lacks any and all HTML and can't play videos, and I can't log out of Gmail. I've tested so many of the provided solutions but none have worked.

Interestingly enough, this seems to be the case for Chrome and Edge, and they can't connect to Google-related things at all.

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Who is the issuer of the certificate?

You can check the date and time and time zone in the clock on your computer: (double) click the clock icon on the Windows Taskbar.

You can check the connection settings.

If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":


Check out why the site is untrusted.

  • click the "Advanced" button to expand this section to see extra details.

If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) then see if you can install this intermediate certificate from another source. Click the "Add Exception" button to inspect the certificate in the Certificate Viewer.

If you can't inspect the certificate via "Add Exception" then try this:

Open the "Add Security Exception" window by pasting this chrome URL in the Firefox location/address bar and check the certificate:

  • chrome://pippki/content/exceptionDialog.xul

In the location field of this window type or paste the URL of the website with the https:// protocol prefix (https://xxx.xxx).

  • retrieve the certificate via the "Get certificate" button
  • click the "View..." button to inspect the certificate in the Certificate Viewer

You can inspect details like the issuer and the certificate chain in the Details tab of the Certificate Viewer. Check who is the issuer of the certificate. If necessary then please attach a screenshot that shows the Certificate Viewer with the issuer.


Do a malware check with several malware scanning programs on the Windows computer.

Please scan with all programs because each program detects different malware. All these programs have free versions.

Make sure you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

See also: