For some reason, I cannot open some navy.mil websites, getting the "Internet Explorer cannot display the webpage error". I have deleted browsing history, I have turned off/unplugged the rounter and modem, I have tried managing add-ons, I have tried Diagnose and Fix the Problem with no success. Some websites are accessible and some are not. This has only happened within the last week and no installs/updates have occurred recently. Any suggestions would be appreciated.