I am receiving numerous messages that "There's a problem with this Website's certificate" for sites I know are good and that I visited frequently when I had Windows 7 and IE (just a couple of weeks, ago). When I seek to go to the website by clicking on the hyperlink that says "Continue to this website (not recommended)," nothing happens. The hyperlink appears that it should work, but it doesn't. Are there any simple (I am far from a techie) ways to deal with this problem? It is extremely annoying to have to try to reach the sites on Firefox. Thanks for any help you can offer.