Two downvotes and no replies. Set your system time several years in the past and see what happens to secure sites. I encountered this issue several times as a

Two downvotes and no replies. Set your system time several years in the past and see what happens to secure sites. I encountered this issue several times as a PC repair technician. We would turn a computer on after summer break and find its CMOS battery had died and the system date had reset. The computer was unable to browse sites secured with SSL certificates. The start time of those certificates were in the future relative to the system time, so the system thought they were invalid.