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Windows Update affecting NDI stability

UPDATE
As of 9th of September 2025 this issue is resolved if you have the following Windows Updates installed:

Windows 11 - KB5065426

Windows 10 - KB5065429


A Windows Security Update has affected the stability of NDI sources on computers that have this update installed.

Link to Official NDI article- https://docs.ndi.video/all/faq/common-issues/traffic-drops-after-windows-update

The affected updates are:

Windows 11 - KB5063878

Windows 10 - KB5063709


Symptoms


The result is severe stability issues for all NDI sources on the affected computer. Including very laggy video, low frame rate and a large amount of dropped frames.

The issue only affects Reliable UDP (RUDP) NDI sources only. Normal UDP and TCP are unaffected.

Check if you have the affected update installed

  1. Open Settings in Windows
  2. Select Windows Update
  3. Select Update History
  4. Select Uninstall Updates
  5. Check to see if you have one of the following updates installed: 
    • Windows 11: "Security Update for Microsoft Windows (KB5063878)"
    • Windows 10: "Security Update for Microsoft Windows (KB5063709)"

How to solve


Option 1:
You can manually change the NDI Receive mode using the NDI Access Manager app available in the NDI Tools pack to use a different Receive Mode. If you already have NDI Tools installed jump to Step 2.

  1. Download and install the Free NDI Tools pack: https://ndi.video/tools/
  2. Once installed launch the NDI Access Manager app
  3. Select the Advanced tab
  4. Change the "Receive Mode" to Single TCP or UDP (Legacy) and press OK
  5. Repeat for any other computers that have the affected update installed and use NDI sources

Option 2:
Run Windows Update ensuring the below updates have been installed as this now fixes the issue:

Windows 11 - KB5065426

Windows 10 - KB5065429

Last Updated: Thursday, September 11, 2025 10:29:10 AM