The most common cause of a security certificate error is the computer date and time. When you get a security certificate invalid or security certificate expired error in Firefox, internet explorer or Google chrome one of the first things you need to check is your computer systems date and time.
After correcting the date and time on you Internet Explorer, Firefox or Google Chrome, you can go to the website that you was having trouble with and try to get in. If you get the same security certificate expired or invalid error, continue to the website anyway and update the security certificate on it.
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Security Certificate Invalid or Expired Error in Web Browser
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http://satellitedirect.gregorygroup.net/ If you are not getting any sound in Internet Explorer 9 there are a few things that you can try to get the sound back on. The no sound problem is common in Internet Explorer since version 7, so what I am saying here may apply dating back IE 7. The first thing you want to do is go to check other programs on the PC for sound. The next thing to do is to check another web browser like Firefox or Google Chrome for sound. If the other web browser is working than you know the issue is with Internet Explorer 9.
Here is how to fix the issue. You can start of by going to tools, internet options, advanced tab. Next go to accessibility and check play system sounds. Than go to multimedia and check play sounds in web pages. Finally in security check use TLS 1.2, hit apply and ok. Restart the browser and you should have sound.