Windows 10: Second screen started lagging since update from windows 10 to 11.

Hi there,Since support for Windows 10 ends in October 2025, I finally decided to upgrade from windows 10 to 11.Since doing so, my second screen LG smart TV has some stuttering during video playback.I've used VLC and the internal Windows player to play different video files, and they all have moments of stuttering. It's like the fps drops a couple of frames. Audio keeps playing correctly.When I move one of the players back to my main PC screen, the problem is immediately solved.So basically I know the video files are not the problem, neither is the TV screen it worked perfectly on windows 10

:)

 

Windows 10 KB3213986 Update Cripples Multi-monitor Gaming

The recent Cumulative Update for Windows 10 (KB3213986) cripples multi-monitor gaming, looking at the way Microsoft worded its "known issues" text. After the update is applied, users with multi-monitor setups could experience screen stuttering or clipped screens when running 3D apps on machines with more than one monitor. The only workaround Microsoft suggests for now entails running your 3D apps in non-fullscreen modes, such as windowed-maximized (pseudo-fullscreen) or windowed modes. Microsoft also goes as far as to suggest that people with multi-monitors could try starting their 3D apps with just one monitor connected.

"Users may experience delayed or clipped screens while running 3D rendering apps (such as games) on systems with more than one monitor," the change-log for the KB3213986 update reads. "To work around this issue please consider the following options: 1. Running the application in Windows mode (not full screen), or 2. Starting the application with only one monitor connected," it adds. The update effectively cripples multi-monitor gaming, using technologies such as AMD Eyefinity or NVIDIA 3D Vision Surround.





Source: Microsoft

 

Windows 10 Suddenly Starts to Lag

Hello,

For us to better assist you, we'd like to know the following:

• Confirm which build is currently installed on your device. To check, follow the steps below:

• Press Windows key + R, then type in winver.
• Click OK.

• Were there any recent changes made prior to this issue?
• Are you using any 3rd party antivirus program?

Meanwhile, we suggest performing the suggested steps on this article
on how to improve the performance of your Windows 10 device.

We look forward to your response.

Regards.

 

Second Monitor Lag

Hi
Shima Xinkai,

Outdated or incompatible drivers can be one of the factors why this issue occurs. That being said, I suggest performing the Hardware and Device troubleshooter. You can follow the steps below:

1. Type Troubleshoot in the search bar and hit Enter.
2. Look for Hardware and Devices and click.
3. Run the troubleshooter and follow the on-screen instructions .
   
4. Check if the issue persists.
   

I also recommend performing the steps in this article on how to Update drivers in Windows 10.

If you continue to have this issue even after performing the above steps, please reply to this thread. The system will notify me so I can get back to you and provide you with more answers.