Few things are more frustrating for Windows users than installing an update meant to fix problems, only to discover it creates new ones. That’s exactly what happened with the August 2025 security patches, which caused widespread streaming issues.
What Went Wrong
Shortly after release, users began reporting severe delays, stuttering, and audio desync when using NDI streaming tools. Popular apps like OBS Studio, one of the most widely used platforms for live streaming, were heavily affected.
Microsoft confirmed the issue, noting that the problematic patches were:
- Windows 11 (24H2): KB5063878 and KB5063709
- Windows 10 (21H2 & 22H2): Same update branches
The bug was traced to how NDI handled audio/video traffic after the updates, leading to degraded performance.
The Fix
Microsoft has now released new patches to resolve the problem:
- Windows 11: KB5065426
- Windows 10: KB5065429
The company recommends all users install these updates immediately, as they not only fix streaming performance but also address additional OS stability issues.
Workarounds and Extra Fixes
For those unable to install the September 2025 update right away, the NDI team suggested switching the reception mode from RUDP to UDP or TCP, which temporarily avoids the bug.
The September patch also fixes another headache for Windows users: unwanted User Account Control (UAC) prompts and app installation errors on non-admin accounts.
Microsoft’s Response
While update-related issues are not uncommon, Microsoft has acted quickly in this case, rolling out fixes within weeks. The company also emphasized its commitment to improving Windows through user feedback and ongoing optimizations.
