Overview

• The regression follows installation of KB5063878 on Windows 11 24H2 and KB5063709 on Windows 10 21H2/22H2, with Windows 11 build 26100.4946 identified as affected.
• Microsoft says apps like OBS and NDI Tools suffer stutter, lag, and choppy audio/video, especially when Display Capture is enabled on the source PC, while consumer services such as YouTube and Netflix are unaffected.
• NDI reports failures occur only on RUDP connections, with UDP or Single TCP remaining unaffected.
• A temporary mitigation advises changing NDI Receive Mode to TCP or UDP via NDI Access Manager, with some users choosing to delay or uninstall the update at their own risk as Microsoft investigates.
• The confirmation lands during a rocky August update cycle that also saw WSUS 0x80240069 installation failures, an out-of-band fix for broken reset and recovery, and a Microsoft request for telemetry on reported drive issues.