Please check that your system clock is correct.
If you see any of these errors:
Please make sure that your system clock is accurate.
Please Click Here to download and run the upgrade
Disable any antivirus that may be running on your system and try again.
If that does not work:
<Requires some technical understanding. Explanation below. >
Please open port 5060 and 5070 UDP on ALL firewalls and your router, if
you have one. (Router ports can be opened via the web application
applicable to your router).
Restart magicJack again by following the three steps above.
How to access Web Application for router
Start > Run > Type in cmd > Press ENTER
A command prompt will open
Type ipconfig > press ENTER
Make note / write down name of the default gateway and IP address
Open your Internet Browser
Type in the default gateway IP (Example: 192.168.1.1)
Type in Username and Password
Find "Port Forwarding" and Forward Port 5060 and 5070 UDP for the IP address you located earlier.