How do I activate Matlab?

I am finding difficulty in activating my Matlab. I activate with the license file, it says "Matlab is activated", but when I access the icon to run the Matlab, then it needs to activate. Each time I do this, but it still not working. Help me please. Thanks

[Mark Sherstan]

Try restarting your computer and verify your internet connection is working. Otherwise please reference this post here: https://www.mathworks.com/matlabcentral/answers/106141-why-am-i-continuously-prompted-to-activate-when-i-try-to-launch-matlab?s_tid=answers_rc1-1_p1_MLT