Is there a problem with Yahoos security certificate?

Question

I can get to my Yahoo mail page but as soon as I click on check mail I get the following message:

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.
Click here to close this webpage.
Continue to this website (not recommended).
More information
If you arrived at this page by clicking a link, check the website address in the address bar to be sure that it is the address you were expecting.
When going to a website with an address such as https://example.com, try adding the 'www' to the address, https://www.example.com.
If you choose to ignore this error and continue, do not enter private information into the website.
For more information, see "Certificate Errors" in Internet Explorer Help.

It will not let me on Paypal or eBay either. The Yahoo page that it takes me to, if I click to ignore and enter is not right. My seal is wrong and nothing looks right. My computer downstairs is working fine and there are no problems with Yahoo or anything. I ran Norton AntiVirus and Antispyware and it came out fine.
Help please.
Darice

Answer 1

You could try a couple of things:

Strange as it sounds, your systems' time must be synchronized to the actual time. Although your machines 'on-board' certificate library may be current, the machine's time is not correct, rendering a mismatch for the sites certificate parameters.

Right click the system tray time clock> Adjust time & Date> Internet time> Update now. (Make sure your system is set to 'Automatic Synchronize...' while you're here)



Another possible fix (XP):

With Internet Explorer, go to Microsoft Updates, then select the 'Custom' button (not the 'Express'). That will tell you all specific updates for your computer (hardware & software) and in this case the certificate updates.



Note: persistent time malfunction could mean malware problem or a motherboard battery issues.



Also of significant import, make certain to have this configuration in your browser:

Tools> Internet options> Advanced> Security heading: check "Warn about certificate mismatch" OK out.

This is really critical to prevent spoofing of SSL certificate issuance, potentially showing the lock and "https://" when in fact it is NOT the real McCoy.

Answer 2

2

Answer 3

Was trying to set up an old computer for my hubby and the same thing was happening with that certificate on Yahoo. Tried forever to get it working, but couldn't. So I just searched on my computer and thanks for the great answer to Dunbar, as I reset the clock and everything is perfect.

Answer 4

I went in and reset the time and the system is working just fine thank you for the help

Answer 5

I had the same issue, checked my PC's calender and yeap, it had somehow been set to July 22, 2014 (today's date is the 22nd of April 2014). Ironically that's the date that FireFox told me the Yahoo security certificate expires....Need to be on the look out if that happens again...Thanks for the answer!

Answer 6

Run Malwarebytes from download.com ... you may have some spyware and/or a redirector goin on

Answer 7

Just your internet.