<![CDATA[Invalid Server Certificate]]>I use Opera on a Windows "XP" computer. I get an Invalid Server Certificate each time I try to connect to many sites, including github. I know Microsoft has stopped supporting "XP", but I found out it's a browser thing. I mean I get the same message when using Opera, Chrome or Firefox, but when I use other browsers like Qupzilla, I can connect with no issues. Is it because Opera hasn't updated "XP" support as well? Any way around this?

]]>https://forums.opera.com/topic/5157/invalid-server-certificateRSS for NodeSun, 17 May 2026 13:34:52 GMTTue, 16 Sep 2014 05:16:32 GMT60<![CDATA[Reply to Invalid Server Certificate on Tue, 16 Sep 2014 13:24:39 GMT]]>

I use Opera on a Windows "XP" computer. I get an Invalid Server Certificate each time I try to connect to many sites, including github. I know Microsoft has stopped supporting "XP", but I found out it's a browser thing. I mean I get the same message when using Opera, Chrome or Firefox, but when I use other browsers like Qupzilla, I can connect with no issues. Is it because Opera hasn't updated "XP" support as well? Any way around this?

Are you on XP SP3 and are you sure chrome works? Firefox uses different SSL libraries so usually Chrome/Oera fail but Firefox works.

Thanks for writing back. I am on XP2 and no browser works other than Qupzilla etc.

]]>https://forums.opera.com/post/51498https://forums.opera.com/post/51498Tue, 16 Sep 2014 13:24:39 GMT<![CDATA[Reply to Invalid Server Certificate on Tue, 16 Sep 2014 13:23:27 GMT]]>

The root of most security certificate issues (at least that's been my experience) is the Date on your computer set wrong. And as skipryper suggested, if your still using XP make sure it has at least SP3.

It's XP2. Never upgraded. Maybe this is the issue. Thanks so much!

]]>https://forums.opera.com/post/51496https://forums.opera.com/post/51496Tue, 16 Sep 2014 13:23:27 GMT<![CDATA[Reply to Invalid Server Certificate on Tue, 16 Sep 2014 12:46:46 GMT]]>The root of most security certificate issues (at least that's been my experience) is the Date on your computer set wrong. And as skipryper suggested, if your still using XP make sure it has at least SP3.

]]>https://forums.opera.com/post/51495https://forums.opera.com/post/51495Tue, 16 Sep 2014 12:46:46 GMT<![CDATA[Reply to Invalid Server Certificate on Tue, 16 Sep 2014 12:00:58 GMT]]>Opera 24 uses the Windows Certificate Store.

Try to get:

  • DigiCert SHA2 Extended Validation Server CA
  • DigiCert High Assurance EV Root CA

from https://www.digicert.com/digicert-root-certificates.htm and add them to Windows Certifacte Store in Trusted Root Authorities

]]>https://forums.opera.com/post/51487https://forums.opera.com/post/51487Tue, 16 Sep 2014 12:00:58 GMT<![CDATA[Reply to Invalid Server Certificate on Tue, 16 Sep 2014 11:34:36 GMT]]>

I use Opera on a Windows "XP" computer. I get an Invalid Server Certificate each time I try to connect to many sites, including github. I know Microsoft has stopped supporting "XP", but I found out it's a browser thing. I mean I get the same message when using Opera, Chrome or Firefox, but when I use other browsers like Qupzilla, I can connect with no issues. Is it because Opera hasn't updated "XP" support as well? Any way around this?

Are you on XP SP3 and are you sure chrome works? Firefox uses different SSL libraries so usually Chrome/Oera fail but Firefox works.

]]>https://forums.opera.com/post/51484https://forums.opera.com/post/51484Tue, 16 Sep 2014 11:34:36 GMT