Firefox "Connection Untrusted"

[Foster426]

My computer came with Windows 7.
Around this time last year I updated to Windows 8, and the 8.1.
Yesterday I removed 8 and went back to 7.
Now Firefox has a "Connection Untrusted" warning before going into most websites. REALLY annoying.
I've tried changing the clock on my computer like most other forums say to no avail.
I turned of Windows Firewall to see if that was the problem and it wasn't.
This is REALLY annoying. I've never had to deal with this before. Any suggestions?

 

[Not Myself]

This belongs in the Browsers & mail forum.

Start here, and note the link on its first line:

Error loading secure sites - MozillaZine Knowledge Base

 

[mitchell65]

Foster426,
Have you tried another browser? If you have a browser problem always try another one or two browsers that way you determine if it is a Windows problem or a specific browser problem!

 

[Foster426]

I'm using Chrome right now. IE works also.
All of this didn't start happening until I removed windows 8.

 

[mitchell65]

If you are saying that there is no problem with Chrome or IE then uninstall Firefox using Revo uninstaller, reboot Windows and reinstall Firefox.

 

[kd the don]

if you had installed any software which effects your browser like avast antivirus which detects any malicious website ,which interfers with your browser then uninstall it if it is installed on a wrong date or time and reinstall it