How to Use a Laptop as a Monitor (Second Screen Setup)

About this video

Kevin shows two ways to use a laptop as a second monitor for another computer in Windows. The first uses Windows’ built-in wireless projection and needs nothing installed beyond an optional feature. On the laptop that will act as the second screen, open Settings (Windows key + I), go to System > Projecting to this PC, and if prompted install the Wireless Display optional feature (View Features > See Available Features > check Wireless Display). Then launch the Wireless Display app so the laptop is ready to receive. On the main computer, press Windows + K, select the configured laptop, and the connection is established. By default the display is duplicated; pressing Windows + K again lets you switch to Extend so windows can be dragged across to the second screen. Display settings reached from the cast panel let you reposition the secondary display (left, right, above, below) so mouse movement feels natural, and choose which display is the main one with the taskbar. Disconnect from the same Windows + K panel. If you hit lag or your device isn’t supported, Kevin offers a second method using spacedesk from spacedesk.net: install the spacedesk driver (choosing the version matching your Windows version) on the main PC, and install the viewer app on the secondary device — viewers exist for Windows, Android, iOS, Amazon, and HTML5, so tablets work too. Launch both, connect from the viewer, and use full-screen mode; switch between duplicate and extend in Display Settings. He adds that a wired Ethernet connection makes spacedesk even smoother.

Key takeaways

• Windows can project to another laptop natively: on the receiving laptop enable Settings > System > Projecting to this PC and install the Wireless Display optional feature if prompted, then launch the Wireless Display app.
• On the main PC press Windows + K to connect, then press it again to change from Duplicate to Extend and to disconnect when finished.
• Use Display Settings via the cast panel to arrange the second screen’s position (left/right/above/below) and decide which display is the main (taskbar) display.
• If the built-in method lags or isn’t supported, use spacedesk: driver on the main PC, viewer app on the secondary laptop or tablet (Windows, Android, iOS, Amazon, HTML5).
• A wired Ethernet connection makes the spacedesk setup run smoother.

Episode details: published April 7, 2026 · 4:56 long. Summary written by Self Growth Videos from the episode itself. Business results and any income figures mentioned are Kevin Stratvert’s own claims, shared for education — they are not typical or guaranteed.

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