I have a Dell Windows 10 laptop connected to the Internet via a router. Whenever I go away from the laptop and close the lid, then return and open the lid, I find that it is disconnected from the Internet. Sometimes it reconnects automatically after about 30 seconds, but sometimes it does not, and then I have to restart the computer and/or restart the router to make it connect again.
This does not happen with another laptop that is connected to the same router, so the problem is not with the router - it is something with the Dell Windows 10 laptop. What can it be?