If you're having wireless issues use these
troubleshooting steps for those times
when your connection is under-performing or
you're not able to connect to the internet.
Check for and update the BIOS and
system drivers using SupportAssist.
Using Windows Search, look for and open 
the SupportAssist app.
Navigate to the Get Drivers and Downloads option
and click on Run Now.
SupportAssist will automatically show
all the available updates.
Simply click on Install and follow
the on-screen instructions.
If you feel your wireless connection is a bit sluggish,
use SupportAssist again to run the Network Optimizer.
Open SupportAssist and within the Home tab,
select Optimize Network
click on Run
and then just follow the on-screen instructions.
Another thing to do is to run the
Windows Network Troubleshooter.
Right-click the wireless icon on your taskbar and
select Troubleshoot Problems.
Choose the type of issue you are experiencing
and follow the steps provided.
If you are unable to connect wirelessly,
it could be that Airplane mode is ON.
For laptops, press the function FN key
and the radio tower icon key simultaneously
You can also try by pressing the Print Screen PrtScr key with the function FN key.
If you're on a desktop, right-click on the
Start button,
go into Settings and click on Network & Internet.
Choose Airplane mode and if it's ON,
use the toggle to switch it OFF.
It's also a good idea to reboot 
the network that you are using.
Turn off the router, by unplugging it,
and shut of the modem.
Your should also shut off your PC.
Wait at least three minutes.
Afterwards, turn on the modem first and let it complete the connection to your internet service provider.
Next, plug the router back in and
let it complete its power on test.
Now turn on your computer and see how your connection performs.
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