recently,when i online,some websites can't get through,it pop up 'certificate error',i want to know what's this & how to solve it,thanks to you guy ,who can help?

Some websites using SSL (Secure Sockets Layer, where the protocol is https), they are required to use a certificate issued by some certificate authorities.  If their certificate is not up-to-date or have problems, then you may not want to trust the website being secured (especially if you are doing credit card payment or sending personal information online).  Can you provide more details about the error you received?

hi,mickeyGoUp,the problem is that:when i connect to the bank with personal code,it pop up 'certificate error' & can't keep on going.   when i connect to public library or some forum (dl tv series),it pop up too,but have a option,that means can keep on display the website that i want to. All i can say that all websites are no problem previous.

ebay, have you tried connecting to the bank site using a different computer or even a different browser on the same PC?  You might want to find out if it is a problem on your browser/PC, or if it is the bank problem.  Normally, if a bank have problem with their certificate, a lot of people will complain and they will fix it very quickly because it will affect their business.

Do you think your browser setting has changed?

Are you able to capture a screen-shot of the error message?

hi,mickeyGoUp,the pop up messageis'to help protect your security,IE has blocked this website from displaying content with secuity certificate error,click here for options :1) display blocked content,2) what's the risk? 3) more information. For the forum & public library,click to 1) is ok but for the bank is not work.    i don't think that is bank problem because previous everything is in good condition,but after i change my virus software to (kaspersky anti-virus) for awhile,then it happened