Well, whatever was wrong with the certificates, and whichever side has to fix something, they apparently did so, because I can now get to my bank, USTVNOW, eBay and my security cameras in Chrome again. Even more certain now that it was a Chrome issue rather than an OS issue since the OS did not change again since the problem started. I noticed that the Chrome settings page was different, so they must have done a fairly substantial update the last time. The version in the boilerplate did not change though, so who knows. All I care about is that computers work again at Casa del Eastside.