I am running Windows 7 Ultimate on my desktop computer. All of a sudden, whenever I try to go to a website I get a Certificate Error (see attachment), including the Experts Exchange website, Yahoo, Google, and other standard websites. At the top of my screen is a bar that explains that content has been blocked (see attachment), and I'm given the "not recommended" option of accepting the "blocked content". Since these are all trusted sites, I went ahead and opted to proceed to the website. In some cases (as with Experts-Exchange) that got me to the website, though it took awhile to get the formatted website (by clicking on a number of links). On other websites (e.g. GoToMyPC) I can never get past the main screen, always being sent back to the Certificate error.