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1 Answer invalid security certificate

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Change the date,time to current date and time and it should be fine,if not..ask me i will suggest further solutions

Posted on Aug 31, 2010


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Posted on Jan 02, 2017


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1 Answer

This is a issue with a add-on installation for you're browser check the following!

Security Certificate is expired or Synchronization Failure. Port 443 is blocked by a firewall or Internet Services Provider (worst case scenario)
Solutions: May vary depending on your Answers.
  1. If you use Firefox browser, its a common issue.
  2. If you use Yahoo messenger, its port may have been blocked.
  3. If you use Plug-ins, either one is having problems and you have to remove it or it has jammed browser configurations.
  4. If your browser is not Updated properly please Update it and check.
  5. Date and Time is the Main Player who would cause such a Problem. You must check System Date and Time. If it has been changed, please set the Correct Date and Time. Either a Plug-in or a Recent Installed or Uninstalled software might have changed it. Or your CMOS battery may need a Replacement.
  6. If you use a Firewall, it might have Blocked the Application or the Port (which is the Secure Sockets Layer Port - Default is 443). Then you have to Adjust and Allow it. To check whether the Port only is blocked you can go to another Login page which uses SSL and verify it. You can try login to a Gmail account if you have one.

The Most Common Reason:
If the System Date or Time had been changed this could occur. That is the most common issue. If you have installed or uninstalled an application it may have reversed the Date and/or Time. It might be a Browser Plug-in as well. If you have recently Installed a Plug-in (or un-installed) it might have caused that. So you have to either disable or un-install the plug-in.

Mar 01, 2011 | Computers & Internet

1 Answer

I keep getting a pop up saying invalid certificate 443 yahoo toolbar

Thanks for visiting FixYa!

If you're using Windows XP, go to Start > Control Panel > Add or remove Programs. Then locate the Yahoo Toolbar and click on Uninstall. After the toolbar is uninstalled, reboot your computer. This should solve your problem.

Feb 24, 2011 | Yahoo Mail

1 Answer invalid security cirtificate iwant valid security cirtificate

Unless you set your browser up for high security, this certificate is bogus. Rarely does a security certificate notice appear on yahoo without having set your browser up for high security.
Lower your security if it set to high and see if the message disappears. If your browser security is set to normal, then this is a bogus certificate for a bogus yahoo site.

Aug 30, 2010 | Computers & Internet

1 Answer

Us data 443 invalid keeps popping up . how do i get rid of this

go to add and remove program and uninstall if any yahoo toolbar is installed. Or try uninstalling and reinstalling the internet explorer which ever you are using and try it. Thank You.

Aug 26, 2010 | Yahoo Mail

1 Answer uses an invalid security certificate Please help

Contact and explain them this situation. You do not have to worry about security certificate inquiry in any way unless you are doing financial transactions like purchasing a commodity over the internet with your credit card.

I hope this solves your problem!

Aug 09, 2010 | Computers & Internet

1 Answer uses invalid certificate

problem security certificate

Aug 08, 2010 | Computers & Internet

1 Answer

Us data 443 uses an invalid security certificate.

I started getting the same message/problem when I upgraded Firefox to the latest version. I went to google and searched Firefox - until I found another version 3.5. I installed 3.5 and have had no problem since.

Aug 02, 2010 | Yahoo Mail

3 Answers


Check the time on your computer. If it's wrong, the computer thinks the certificate is out of date, or not in date yet.

Hope this fixes the problem for you!

Jul 09, 2009 | Yahoo Mail

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