IE: Solve “The security certificate has expired or is not yet valid”

If you are getting a message popping up on certain web sites when using IE that says The security certificate has expired or is not yet valid, you will want to check the date and time your computer is set to. An incorrect date or time is the most common cause for this error.

Just double-click on the time in the lower right corner on the Taskbar, select “Change date and time settings” > “Change date and time…“, then set the time correctly. Be sure to check the time, month, date and the year. As soon as it is corrected, this will usually fix this issue.

If the time keeps switching on your computer, it may need a new CMOS battery. You can usually replace them yourself. They usually are the same type of battery as you would use in a watch.


  1. Rana says

    thank u very much ..
    this was very helpful
    actually date was set unpropperly on my PC that is why I had the certificate issue.

  2. Mike Hough says

    Thank you! Thank you! Thank You! I have tried to solve this problem for two days. I even formatted my hard drive and reinstalled my software, but the problem persisted. It was the clock time setting! I am out of work – our school funding has dried up, and I can’t afford a tech service right now. If I could pay you, I would. “Certificate has expired” warnings kept persistently popping up and I could not access my email or Facebook. Many other programs would eventually display in left formatted text. You are the first and only person to suggest that it could be the clock setting! I thought drivers, security settings, firewall, malware, etc.
    Thanks again! Mike

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