Insecure connection warning in Internet Explorer and Chrome. Both are the latest version and we have all of Windows updates installed. IE sometimes allows to proceed through the warning as insecure connection while Chrome does not. IE also displays sometimes information about not being able to find revocation certificate information for that website while Chrome does not do that. Even though both browsers display those insecure connection warnings, the website addresses are https;//. Weirdly, we had this problem in Chrome on Friday, then opened IE to check if that will work and it opened fine without warning. We have BitDefender antivirus installed. The issue occurs on few computers, Windows 7 Pro x64 and Windows 10 Pro x64. All computers are Dell OptiPlex.