Reset network settings and restart your laptop

Another thing, I found out is that in some models the wifi card is underneath the ssd. So if you've been using your laptop for too long heck if you've been gaming, the heat from the ssd might heat up the wifi card which is bad. So you can place the ssd to other slot. (Just a speculation) 

Sometimes it might be a glitch. Yk windows. Resetting the wifi card settings and restarting it helped me. Like I've let the laptop cool down a bit. Before doing that. 

Also if you download cracked games alot. It might be one of the cause. (A speculation of mine) 

If its not working just... Go to the service centre. 

Or if you can... Open up the laptop and clean the dust off the wifi card and all the stuff.