I dont use proxy server,
i'm from japan
also the first time I received this message is when i'm trying to access google.com then I uninstalled google chrome and try reinstalling it... I can now access google.com but when I trying to log in my account on youtube.com this page pop outs again...
up till now there is no problem accessing other sites, I just experience it today... and I try searching the net about my problem but I found that you must fix the time on your computer, but my computer is on right time and time zone (osaka, japan, tokyo)