How To Fix: The security certificate has expired or is not yet valid

The first time I came across this issue was when a guy called me because, after re-installing WinXP on his computer, he kept receiving the following error message when trying to get online: the security certificate has expired or is not yet valid.

Tried updating the certificates according to info on the internet, then tried rolling Internet Explorer back to the previous version. Still nothing.

I got him to check out his settings and compare them to mine. I opened IE, then clicked on Tools, Internet Options, then the Security tab and clicked on the Custom level button.

IE-Security settings2

Down towards the bottom is a “Reset custom settings” option, mine was set to Medium-high (default) his was on High but he was unable to change it.

IE-reset security level

We went step by step through all the settings in the list above trying to change it manually, using the settings on mine as a guide. But when he clicked on OK to save the settings the certificate error message still kept popping up.

So online again, finally coming across this simple solution. CHECK THE DATE ON YOUR COMPUTER. Browsers have security certificates built in that have a start date and an end date. If the date on your computer is off one way or the other, that can cause this error message.

cmos-batteryThis was back in 2010, his date set to 2001. When he set it to 2010, problem solved. It’s such a simple thing but I’ve had a number of calls over the years dealing with the same issue. It can happen in any version of Windows and will often occur if/when the CMOS battery dies or is dying.


About the Author

Terry Hollett

Terry is a self-taught computer aficionado, who after being exposed to Windows 3.1 in the early 1990's devoured every book and magazine on the subject he could get his hands on. A published author with over 20 years' experience building and servicing computers for friends and family he started his first website in 2002 at Hit Any Key.

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