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Windows 11 cannot detect second monitor after update

Pamela 15 Reputation points
2025-12-04T17:30:33.3433333+00:00

Windows 11 cannot detect second monitor after updates. Worked fine yesterday, this morning, not working. There have been multiple updates installed overnight.

Windows for home | Windows 11 | Display and graphics

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  1. Ando Lataire 0 Reputation points
    2025-12-08T08:45:15.08+00:00

    Hi everyone

    For me the issue appeared after the update '2025-11 Preview-update (KB5070311) (26200.7309)'. Windows just simply reset the display settings next to the button "detect" to "display only on 1". I had to manually set it back to "expand displays". I wonder why microsoft decides to reset your settings but it is incredibly annoying! Also some privacy settings got reset... I am not to owner of my own pc anymore :(

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  2. Restee Miranda 14,060 Reputation points Independent Advisor
    2025-12-04T18:06:03.0866667+00:00

    Hi Pamela,

    I understand it's frustrating when a second monitor stops working after an update. This often happens because display drivers or settings are reset during the update.

    First, let's check a few things. Go to Settings > System > Display and click Detect under Multiple Displays. If that doesn't work, try unplugging and plugging the monitor back in, or try a different cable or port.

    Also, check Device Manager for any warnings on the display adapter. If there are any, try updating or reverting the driver.

    Is the monitor powered on and properly plugged in? Do you know if you're using an HDMI, DisplayPort, or another type of connection?

    Best

    rez

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  3. AI answer

    2025-12-04T17:30:50.3633333+00:00

    If Windows 11 is unable to detect a second monitor after recent updates, there are several troubleshooting steps you can take:

    1. Check Connections: Ensure that the cables connecting the monitor to your PC are secure and that the monitor is powered on.
    2. Display Settings: Right-click on the desktop and select "Display settings". Check if the second monitor is detected. You can also try clicking on "Detect" to see if Windows can find the monitor.
    3. Update Graphics Drivers: Sometimes, updates can affect drivers. Go to Device Manager, expand the Display adapters section, right-click on your graphics card, and select "Update driver".
    4. Rollback Updates: If the issue started after a specific update, you might consider rolling back that update. Go to Settings > Update & Security > Windows Update > View update history > Uninstall updates.
    5. Use the Troubleshooter: Windows has a built-in troubleshooter for hardware and devices. Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters > Hardware and Devices.
    6. Check for Further Updates: Sometimes, subsequent updates may fix issues caused by previous ones. Go to Settings > Update & Security > Windows Update and check for updates.

    If these steps do not resolve the issue, you may need to consult Microsoft Support for further assistance.

    References:

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  4. Restee Miranda 14,060 Reputation points Independent Advisor
    2025-12-04T19:21:29.7533333+00:00

    Thanks for the confirmation. Given that the HDMI is connected and the monitor is on, we should check if the update changed your graphics driver. In Device Manager, update your display adapter's driver by selecting Search automatically. If that doesn't solve it, Roll back driver if possible. Also, try restarting in Safe Mode to see if the second monitor appears. If it does, the issue is a driver conflict. Could I get your graphics card's make and model?

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