IE prompts "The security certificate for this site has expired or has not yet entered into effect" how to do

Today I met a child shoes in the open QQ mailbox when the problem of IE certificate error. The specific situation is opened QQ mailbox by IE browser blocked access, and prompted "This site security certificate has a problem", if we still want to open this site, you can click "Continue browsing this site (not recommended)."

Although the site has continued to open, however, the browser address bar shows a certificate error, click the word "certificate error" prompts "the security certificate issued by this web site has expired or not yet taken effect, the certificate may no longer be trusted", with a look at the truth. Click the "View Certificate" button below.

In the Open Certificate window, it is found that the validity period of the certificate is written from 2013/1/8 to 2014/3/29, and it is now February 2013, then the certificate should be within the validity period, why is the prompt expired or has not yet taken effect?

Then open the local time a look, the local date is written February 5, 2012, the original is the local system time set wrong, and then immediately back the system time to the correct time.

Open the QQ Mail again, the certificate false hint disappeared, the website can also normal visit