Can't connect to some pages (I think it has to do with secure sites)

I get this when trying to login sites like yahoo or runescape account settings/membership shop/etc and other sites I've and I've tried switching my dns and playing with the winsock setting and neither have worked also I've turned off firewall did nothing to help so its back on.. any ideas? been going on for 2 months... oh also sometimes when diagnosing errors I get a thing saying "one or more protocols are missing on this computer " but it doesn't happen all the time when trying to see the issues at hand it mainly says nothing is wrong or can be found to be wrong... I'm at my wits end sadly. also sometimes when I get the protocol thing and click repair as admin it works and says its fixed but I get the error on not reaching sites even if it says its fixed.. please help me anyone.

CountMike said:

Try changing HTTP to HTTPS in address.

i've tried this.. and for some sites like runescapes secure account pages you can't change it it didn't work though.