Dell Latitude D600 Notebook "security certificate errors google" Questions

...certificate is not valid. Not sure what to do, I can get to these sites from my other computers. I bought this computer from a friend so i have no disks or anything to restore it. This has to do with ...

...security certificate'. How do I fix this? When I try to log on to google, it says 'there is a problem with the websites security certificate' how can I fix this? We are logged on to wifi, and ...

...security protocol not compatible with the site's certificate. It depends on which browser you're using, but I have a few fixes in mind. If you're using Internet Explorer: At the top go to Tools then ...