When trying to access gmail.com via chrome I get this error message:
The same error message appears with ninite.com or twitter.com - drive.google.com, youtube.com or facebook.com (all with https) on the other hand are just fine. The access to these sites is the same using IE.
My OS is windows XP with service pack 3. The system time is correct. The certificate is valid until April 13, 2015. Chrome is up to date # 40 (tried the beta version # 41 as well). Browsing incognito still gets the error message. I have deleted all of the browsers data and restored the browsers to the default settings which didn't solved the problem.