WiFi won't stay on

I have a Dell pc 2years old Windows 10 & it"s been fine & I am on WiFi been on for over a year when suddenly it stops working It shows that it's connected & all bars but can't get on internet. All other devices can connect. It tells me that connection was interupted network change was detected. I have checked everything I can think of went to Dell & it diagnose my pc which was a windows 8 but I updated to windows 10 & that was quite awhile ago worked just fine until now. I have a Dell wireless adapter which I updated the driver. I diagnose eveything on my pc & ran a network diagnostic test.

Please has anybody got any ideas.

Please help.

Thanks!

I didn't find the right solution from the Internet.

References
www.tomsguide.com/answers/id-3342285/wifi-stay.html

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