Security Certificate errors!

Question

When I try to access yahoo mail or wellsfargo.com I get a certificate error page saying that the certificate is expired or not valid. Then it says security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.

Also my Windows Live OneCare started saying it's at risk but didn't say what the problem was. I un-installed it and tried to re-install it but now it says that networking problems are preventing it from installing and when I went to their get help it told me to un-installl the program which I already did =(

What’s wrong? What should I do???

Answer 1

Make sure the date, time and year are correct on you comp. This can cause a cert. error.