I am trying to open https://github.com on IE 11 and Chrome but it gives a SSL certificate error
NET::ERR_CERT_AUTHORITY_INVALID on chrome with no option to proceed ahead.
It's happening with almost every site but luckily I am getting the option to proceed. Then I installed Firefox (portable version) and checked that it works without any problem!
Digging further I found that Firefox is using system proxy settings and I do not see any settings in IE and Chrome. What could go wrong . How to fix this ?
I have tried a lot changing the Advanced Security setting in Internet Explorer but no help.