A laptop’s screen lacks the ports that a typical monitor uses to receive input from a desktop computer because they were never meant to function as a stand-alone device. As a consequence of this fact, it is not possible to plug a desktop computer into a laptop and use its screen as the display.
Connect your desktop to a laptop with an Ethernet cable.
Type in control panel .
Click Control Panel.
Click Network and Internet.
Click Network and Sharing Center.
Click Change adapter settings.
Select both connection icons.
Also, how do I connect my laptop to my desktop?
Method 4 Sharing Internet on Windows