Hi everybody,

My Vista machine stopped responding and so I had to use cold re-boot. Now I'm unable to open some of my regular sites such as gmail and my e-mail connecting to my work.

I'm getting this error

There is a problem with this website's security certificate.


The security certificate presented by this website has expired or is not yet valid.

Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.
We recommend that you close this webpage and do not continue to this website.
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when I simply try to go to gmail.

What can I do to fix the problem?