The Server’s Security Certificate is Not Yet Valid

In this guide, I will share how to fix “The server’s security certificate is not yet valid” error message that shows up in your browser, particularly Google Chrome, when browsing sites that use SSL (Secure Sockets Layer) connections.

Fix Security Certificate Error

Generally, the fix to the said security certificate error is to adjust system time.

First, you need to check if Windows Clock is current most especially the date. If yes, it might be that the website’s security certificate is expired already. In that case, you don’t need to do anything. Just wait until the website’s certification is renewed by its owner or the company.

If Windows Clock is out-of-sync, you can update it by either adjusting it manually or synchronize it to a Windows Time Server which is more convenient.

Here’s how to synchronize Windows Clock to Time Server.

Sync Windows Clock to Time Server

The following steps are applicable to Windows Vista, 7 and 8 users.

Step 1: Right click Windows Clock in task bar.

Step 2: Select Adjust date/time.

Adjust Date or Time - Fix Security Certificate error

Adjust Date/Time

Step 3: Go to ‘Internet Time’ tab. Click ‘Change settings…’ button.

Step 4: Click Change settings… button

Step 5: Click Update now. You’ll get a notification like below if the synchronization is successful.

The click was successfully synchronized with on 2/19/2012 at 6:45 AM.

Put a check mark on ‘Synchronize with an Internet time server’ box if Update Now button is grayed out. Enabling that option will make Windows synchronize automatically to your nominated Time Server from time-to-time. Hence, it will save your time from manually updating Windows Time if necessary. Plus, Windows Clock will be kept up-to-date.

Step 6: Re-launch your internet browser then re-open the website where you get the error message or go to

Change Time Server

Keep changing the Time Server if the system fails to synchronize Windows Time. Here’s a short guide on how to do it:

Step 1: Right click Windows Clock in task bar.

Step 2: Select Adjust date/time.

Step 3: Go to ‘Internet Time’ tab. Click ‘Change settings…’ button.

Step 4: Select your preferred Time Server in the drop-down list. Click Update now afterwards.

Internet Time Settings in Windows 8 - Security Certificate error fix

Internet Time Settings – Windows 8

Additional Tip

If you notice that Windows Time keeps on switching back to a certain time, consider replacing the CMOS battery in motherboard. It plays an important role in storing information of your machine’s BIOS as well as keeping the system time current. Windows Time will not work properly if the battery is faulty.

The server's security certificate is not yet valid! error message in Google Chrome

The server’s security certificate is not yet valid! error message in Google Chrome


  1. By Anshul on

    tried this.. shows an message saying ” An error occurred while synchronizing with this server” .. problem persists . Is there any other way ?


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