Adding an extra display to Windows is one of the best ways to improve your work productivity or create a more immersive gaming experience.
But unfortunately for a lot of Windows 10 users, it doesn’t always work as it should. Quite a few people have reported an error message telling them their second monitor can’t be detected, even though they know the monitor works and the video output it’s connected to is fine.
If this is happening to you too, don’t give up hope. Usually it’s an easy problem to fix.
Why can’t Windows 10 detect my second monitor?
Usually it’s a driver problem. If your video driver is out of date, incorrect or faulty, Windows 10 won’t be able to extend or mirror your desktop to your second display. It’s also possible that your monitor driver is causing the problem.
How do I fix this error?
Here are 2 solutions you can try to fix this problem. You may not have to try both of them; try Method 1 first, and if it doesn’t work, try Method 2.
Sometimes the latest drivers don’t work properly on Windows 10. To check if this is what’s causing your problem, simply roll back to a previous version of your video driver (aka ‘display driver’) and your monitor driver.
1) On your keyboard, press the Windows logo key and X (at the same time) to invoke the quick-access menu.
2) Click Device Manager.
3) In the Display adapters section, right-click on your display device software, and select Properties.
4) Select the Driver tab and click Roll Back Driver, then follow the on-screen instructions.
5) Go back to the Device Manager again, but this time expand the Monitors section, right-click on your second monitor, and select Properties.
6) Select the Driver tab and click Roll Back Driver, then follow the on-screen instructions.
7) When complete, restart your computer, and see if Windows can now detect your second monitor.
If rolling back your video and monitor drivers doesn’t enable Windows 10 to recognize your second monitor, it’s likely that you’re using the wrong drivers altogether.
There are two ways you can get the right drivers for your video card and monitor: manually or automatically.
Manual driver update – You can update your video and monitor drivers manually by going to the manufacturer’s website for both your video card and your monitor, and searching for the most recent correct driver for each. Be sure to choose only drivers that are compatible with your variant of Windows 10.
Automatic driver update – If you don’t have the time, patience or computer skills to update your video and monitor drivers manually, you can, instead, do it automatically with Driver Easy. Driver Easy will automatically recognize your system and find the correct drivers for your exact video card and monitor, and your variant of Windows 10, and it will download and install them correctly:
1) Download and install Driver Easy.
2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.
3) Click the Update button next to the flagged video driver and/or monitor driver to automatically download and install the correct version of that driver (you can do this with the FREE version).
Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system. (This requires the Pro version which comes with full support and a 30-day money back guarantee. You’ll be prompted to upgrade when you click Update All.)
4) Restart your computer and check to see if Windows 10 can now detect your second monitor.
That’s all there is to it. Hopefully one of these methods resolves your problem, and you can now extend your desktop to your second monitor, or mirror/project your laptop onto your second monitor.
Please feel free to leave your comment below if you have any questions.