Wifi is on but the system say it doesn't

Hi.
I have a wifi problem. Each time when i turn on my computer or i wake it up from sleep my internet connection is gone. When i troubleshooting it give me an answer that my Wifi is turned off. After that i go and do check my wifi (on my computer FN + F8) . It shows me the wifi is on so i either way I have to turn off the wifi with the buttons and after turn on again and just after will find internet. It is really annoying to do that every time. Does anybody have a solution ?

Thank for helping