Microsoft’s August 2025 Patch is not the company's finest moment. It's already had to patch over 100 vulnerabilities, including one zero-day flaw for an exploit in Windows Kerberos. Users claim various streaming apps like OBS and NDI Tools have also tanked in performance since the update rolled out. Now Microsoft has confirmed the latest update is to blame for widespread issues with severe lag and stuttering. While there are a few potential workarounds to try, you may have to wait a while for a more permanent solution.
"Severe stuttering, lag, and choppy audio/video might occur when using NDI (Network Device Interface) for streaming or transferring audio/video feeds between PCs after installing the August 2025 Windows security update," Microsoft said in a post to the issue tracker for Windows updates, as first spotted by Bleeping Computer. NDI, a protocol used to transmit high-definition video over a computer network with low latency and high quality, is widely used in video production and broadcasting. According to the company, "the issue affects streaming apps, including OBS (Open Broadcaster Software) and NDI Tools, especially when 'Display Capture' is enabled on the source PC."
