Problem I have is that ... also Version 12 on XP has stopped going into any site with security - just comes back and says the signature is out of date or something...
We seem to be going backwards? ...
We're not so much going backwards as the Internet and current reality are moving onward, but Opera 12 remains a browser frozen in time... so it's not moving anywhere. Communications with a secure site require a number of things to line up correctly: acceptable secure communications protocols, acceptable signed key certificates for the site accessible by the browser from its own computer and current with both the comm protocol and the specified encryption method(s) offered by the site, the specified encryption method(s) available via the browser, and no hiccups occurring in any of the handshaking necessary to set it all up when a site is visited. However, acceptable communications protocols change in response to both emerging exploits and progress in standards; certificates change for a variety of reasons; encryption methods evolve with the passage of time. As time goes by, it will be harder and harder for an unchanging Opera 12 to stay current with the demands of secure sites.
BTW. now that I think about it - do you have any Extentions enabled? If I remember it right there where within the old myopera community forums some Posts about certain extentions causing such a problem as you are (non-)describing in general just as "can't access youtube" (If you have any extention at all, thats another reason to try a clean/unmodified portable install)...
It will not, I guess.
If you want to remove ads, I recommend this extension:
Otherwise, you need to find an extension, that fits you best. After 1 minute search I got this link:
I did't test it. You must find, what is best for you.