1. Right click on desktop
2. Go to Settings tab
3. You should see the “2nd” monitor in the monitor icon area
4. Click on the 2nd monitor.
5. Check the “Extend my Windows desktop onto this monitor.” checkbox.
If that checkbox is not available then your graphics card does not support or you may need to get a more recent driver. I’ve usedd this setup on my last two laptops and it worked great.