I can't open Google or Gmail pages on any browser. Tried IE, Firefox and Chrome. I receive a certificate error message, and when I click continue on IE I receive a 404 error, the page couldn't be found. On Chrome the screen stays white. I scanned for viruses using AVG and MalwareBytes and nothing was found. I can access any other site, except Google ones. The computer date is correct.
Any idea on what could be causing this?