How to Troubleshoot screen flicker when screen sharing in Zoom App

If your screen flickers black several times while you are screen sharing in a meeting, follow these steps to troubleshoot the issue.

Note: If you’re encountering a black screen while screen sharing, and are on a Windows or Linux device, follow troubleshooting steps for black screen during screen share.

Prerequisites for troubleshooting screen flicker when screen sharing

  • Zoom desktop client for Windows, 5.7.6 or higher


Uninstall and reinstall Zoom

  1. Run CleanZoom to uninstall Zoom completely.
    Note: Use of the clean uninstaller will completely remove the Zoom client, as well as the Zoom plugin for Outlook. The Outlook add-in, Chrome/Firefox extensions, and GSuite add-on are unaffected.
  2. In the download center, download and install the 64-bit Zoom client for meetings.
  3. Once installed, open the Zoom desktop client, start a meeting with screen share, and test to see if the issue persists.

Modify the Video Rendering Method

If the issue persists after uninstalling and reinstalling Zoom, change the Video Rendering Method in the Zoom desktop client.

  1. Sign in to the Zoom desktop client.
  2. Click your profile picture, then click Settings.
  3. Click Video .
  4. Click Advanced.
  5. In the Video Rendering Method drop-down field, select Direct3D11.
  6. Restart your computer, then test the screen share again.
  7. If the issue persists, select Direct3D9 in the Video Rendering Method drop-down field of advanced video settings.

Manage Share Screen settings

  1. Sign in to the Zoom desktop client.
  2. Click your profile picture, then click Settings.
  3. Click Share Screen share-screen-button__1_.png.
  4. Under Window size when screen sharing, select the Show my Zoom Windows to other participants when I am screen sharing check box. Note: If it is not feasible due to security, skip this step.
  5. Click Advanced.
  6. Deselect the Use TCP connection for screen sharing check box.
    Continue using UDP connection for screen sharing.
  7. Under Use hardware acceleration for, deselect the Screen sharing check box.
  8. Exit out of Settings, then test the screen share again.
  9. When starting screen share, select the Optimize for video clip check box.
  10. On your computer, use Activity monitor settings or Task Manager to close all unnecessary programs to conserve system resources.

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Frequently Asked Questions


Several people experienced screen flickering when using Zoom conferencing and a zSpace system when they enabled screen sharing. Because of its higher refresh rate, zSpace systems are typically unable to handle a refresh rate that is high enough to handle Zoom’s system. As a result of live content, the presenter has the opportunity to interact with the audience at just the right time.
When you are sharing your screen via a full-screen video, you should make sure that the video is optimized for the full-screen
  1. The screen sharing controls can be accessed by clicking the More button.
  2. It is necessary to enable Optimize for video clips by clicking on the button.
  3. As soon as you share your screen, you can start playing your video.
Hello @RN, I can confirm that the flickering occurs on a wide range of virtual backgrounds, both with videos and with images.
  1. Having Zoom open in your taskbar is simple enough; you can just right-click it and select Quit Zoom from any of the drop-down menus that appear when you right-click on it and then click on the “Loading” button at the bottom of the menu.
  2. Obtain a copy of CleanZoom ( from the following link:
  3. CleanZoom.exe should be run as soon as possible.
The reason for the glitches you are experiencing is that Zoom may not be able to distinguish between the virtual background set by you as well as your natural background because the virtual background blends with your natural background and is presenting a blending effect.
The black screen you might see when you are sharing your screen with the browser during screen sharing could be caused by a graphics card with automatic graphics switching (such as an NVIDIA graphics card). The NVIDIA Control Panel can be found under the Graphics tab in the Control Panel of Windows, which can be accessed from the Control Panel. Choose Manage 3D Settings from the menu that appears. Please click on the Program Settings link on the left side of the page to use the following 3D settings section.