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Fixed: Windows 10 Cannot Detect the Second Monitor


In order to improve the work efficiency, more and more users hope to use two or more monitors to connect one computer. Lots of users have this issue: The computer cannot detect the second monitor when we upgraded the system from Windows 7, 8, Vista to Windows 10.

Usually, this issue is caused by the graphics drivers. In this article, we will introduce you how to troubleshoot this issue.

Solution 1: Update Graphics Driver In Device Manager

1, Go to Device Manager.

2, Expand on Display adapter option. You can catch the Graphics device such as the NVIDIA Geforce GTX 750 Ti. Right-click it and choose Update Driver Software.

update nvidia gtx 970

3, You can choose Search automatically for updated driver software option. The Windows will detect and update the driver automatically.

search for updated driver software

Also, we recommend you these articles:

How to Update NVIDIA Driver in Windows 10

4 Ways to Download and Update AMD Graphics Drivers in Windows 10

4 Ways to Download and Update Intel Graphics Drivers in Windows 10

Solution 2: Uninstall Graphics Driver and Reinstall It

If the solution 1 is not useful for you, you can try to uninstall the graphics drivers. Please reboot your computer and the Windows will reinstall the default graphics driver to your computer.

It is recommended that there is a kind of driver updating tool, Driver Doctor. It is very safety for Windows operating system.

Driver Doctor can help you to solve all driver issues including downloading or installation for Windows 10, 8, 7, vista system. Its proprietary One-Click Update technology not only ensures that you have correct driver versions for your hardware, but it also creates a backup of your current drivers before making any changes. It’s very fast and convenient for you.

download driver doctor

Solution 3: Dual Monitor Setups On Your Computer

For freshmen to use dual monitor, you can do some settings on your PC besides update the graphics drivers if you need.

Usually, the Windows 10 can detect the second monitor after you update the drivers. But only one is working well, another is not.

Please follow below steps to solve it.

1, Right-click on the desktop and select Display settings option. You can go into Display settings box.

display settings

2, You can catch the Customize your display on the right and click the Detect option. The Windows will detect the second monitor.

You can find the drop-down list of the Multiple displays. Click it and choose the Extend these displays.

Then, check the Make this my main display option as default settings.

customize your display

Finished, the second monitor will be worked at the same time.

You can also press Win + P key to open the PROJECT box on the right of the screen and select the Extend option to changes.

extend dual monitor


For users who need to switch multiple programs each other frequently, it's better to be able to use two monitors. If the Windows 10 cannot detect the second monitor when you upgraded the system from Windows 7/8/Vista to Windows 10, you had better update the graphics driver at first.

Hope the instructions here can help you resolve the problem.

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