This Connection is Untrusted problem ေျဖရွင္းနည္း

Troubleshoot #1: Fixing Why Firefox Says, “This Connection is Untrusted,” On Every Site You Visit
 

Firefox users from time-to-time may see the above message. Now, depending on the website you are visiting, this message could serve as either a warning or an error. If you’re not sure which of the two it could be, the easiest way to get some kind of an idea is to look at your computer’s Time & Date settings. If you’re date and time are correct, interpret this as a warning and click on the “Get me out of here!” button. If you’re date and time are incorrect, this message is more likely due to an error with your system.
Why Does the Message Appear On Every Page?
This happens because according to your system, the certificate of the website you are trying to access is invalid. Before jumping to conclusion, have you recently reinstalled your computer’s operating system? If so, have you checked to make sure that your “Date & Time” settings are accurate? I ask this because the website you are trying to load is sending your computer a digital certificate which contains 2 important dates: a date of issuance, and expiration, both of which must be valid in order for you to view the page.
What Is The Digital Certificate?
Without getting too “nerdy” on you, whenever you go to a website, your computer requires verified, valid proof of the website’s identity. This is done using signed certificates sent directly from the website to your computer. It ensures that your personal information remains “your personal information,” and is most commonly used with websites whose address starts with https–usually requiring the user to log in with a username and password (“Public key certificate,” 2011).
Because your computer relies on its internal clock, if it is incorrectly set (whether by a minute, day, month, year, decade, etc.) while you’re trying to access a website, the certificate that is issued from the website, stamped with the correct date, is considered invalid because the computer can’t verify something whose date of issuance hasn’t systematically “happened,” or whose expiration date has already passed.
FOR WINDOWS USERS
 

To fix your date and time settings, after you close Firefox completely…

(1) Double-click on the clock on the icon task tray in the bottom right of the screen. The window on the left will pop up.

(2) Adjust to match the current date and time, and click the OK button.

(3) After the date and time window is closed, launch Firefox and try opening one of the websites you visit regularly.

(4) If all goes accordingly, no more “Untrusted” message!
ဒီလို  problem ၿဖစ္ခဲ့လ်ွင္   လက္ရွိ  Date & Time ကို ေျပာင္းၿပီး   ေၿဖရွင္းလိုက္ပါ ။