Windows 10 KB5065429 Issues: AutoCAD UAC Prompts, OBS Studio NDI Lag, and the Future of 22H2

Introduction

The September 2025 cumulative update KB5065429 for Windows 10 (version 22H2) has triggered unexpected problems for certain widely used applications. Users of AutoCAD 2022–2026 have reported being forced to approve User Account Control (UAC) prompts every time they launch the software. Meanwhile, streamers relying on OBS Studio with NDI (Network Device Interface) have experienced severe lag, stuttering, and audio desynchronization after applying the patch.

At the same time, Microsoft has officially confirmed that Windows 10 version 22H2 will be the final feature update, meaning users should start preparing for an eventual upgrade to Windows 11.

In this article, we’ll break down the issues, their causes, official workarounds, and some pro-level tips and tricks to help you keep your workflow stable.

AutoCAD (2022–2026) and the Unexpected UAC Prompts

The Symptom

After installing KB5065429, many users launching AutoCAD suddenly encounter a UAC prompt requesting administrator privileges. This behavior can be disruptive, especially in corporate environments where users operate under standard accounts.

The Root Cause

The problem lies in Microsoft’s recent MSI Repair Hardening. Starting from August 2025 updates, Windows enforces stricter rules when an application tries to perform a self-repair via MSI packages. What used to run quietly under user permissions now triggers a system-level check, requiring admin approval.

Workarounds

• Apply the latest cumulative update
  Microsoft is gradually addressing this bug through subsequent patches. Always install the newest available updates.
• Run AutoCAD as Administrator
  A temporary workaround is to right-click the AutoCAD shortcut and select Run as Administrator.
• Group Policy or KIR (Known Issue Rollback)
  In enterprise setups, admins can deploy Microsoft’s rollback policies to relax the MSI enforcement temporarily.

OBS Studio + NDI: Lag and Stuttering Problems

The Symptom

Streamers using OBS Studio with NDI to send video/audio across PCs have reported frame drops, unstable audio, and major delays after KB5065429. The problem worsens when Display Capture is enabled.

The Root Cause

The culprit is the RUDP (Reliable UDP) protocol. This hybrid protocol combines UDP’s speed with TCP-like reliability. After the update, RUDP began misbehaving, causing excessive packet retransmissions and latency.

Workarounds

• Switch Transport Protocol
  Change NDI’s receive mode from RUDP to either TCP or plain UDP. Many users report stability improvements.
• Use Alternative Capture Modes
  Instead of Display Capture, use Window Capture or Game Capture to bypass part of the affected pipeline.
• Update Regularly
  Microsoft has acknowledged the issue and is issuing fixes in newer builds. Keeping OBS and Windows fully updated is the best long-term solution.

Windows 10 22H2 as the Final Version

Microsoft has officially stated that Windows 10 version 22H2 will be its last feature update. From here on, the operating system will only receive monthly security patches and critical fixes until its end-of-support date.

• Home/Pro editions: support ends October 14, 2025.
• Enterprise/Education: support may be extended through ESU (Extended Security Updates) until 2028.

This means organizations and individuals relying on Windows 10 must start planning a migration strategy toward Windows 11 (24H2 and beyond).

Glossary of Key Terms

• UAC (User Account Control): Windows feature that asks for admin approval before critical system changes.
• MSI (Microsoft Installer): Packaging system used for installing and repairing Windows apps.
• NDI (Network Device Interface): Protocol for sending high-quality video/audio streams over a LAN.
• RUDP (Reliable UDP): A networking protocol combining UDP’s low latency with reliability guarantees.

Pro Tips and Hidden Tricks

For AutoCAD Users

• Reduce Startup Load
  Disable unnecessary add-ons and startup scripts to reduce MSI repair triggers.
• Separate User Profiles
  Run different AutoCAD versions under separate Windows user accounts to minimize conflicts.

For Streamers Using OBS + NDI

• Optimize Your Network
  Use a wired Gigabit LAN with a dedicated switch rather than routing through consumer Wi-Fi or routers.
• Experiment with Encoders
  OBS supports x264 (CPU), NVENC (NVIDIA GPU), and AMF (AMD GPU). Switching encoders can mitigate stuttering.
• Split Streaming and Recording
  Many professionals dedicate one PC for live streaming and another for local recording using a capture card instead of NDI.

Windows Update Management

• Pause Updates for 35 Days
  This feature is useful when waiting to see if a new patch introduces issues.
• Understand KIR (Known Issue Rollback)
  Microsoft can remotely revert problematic updates. Enterprise admins can enforce this instantly via Group Policy.

Preparing for the Future

• Run the PC Health Check Tool
  Ensure your system meets Windows 11 requirements (TPM 2.0, Secure Boot).
• Use Dual Boot or Virtualization
  If you must keep Windows 10 for legacy apps, run it in a VM or set up dual boot alongside Windows 11.

Pro-Level Diagnostics

• Use Event Viewer
  Both AutoCAD UAC prompts and OBS stutters often leave traces in Application Logs. Reviewing them helps identify modules causing trouble.
• Test on a Secondary PC First
  Streamers and professionals often maintain a “lab PC” to apply updates first, reducing the risk of downtime on their production system.

Conclusion

• AutoCAD (2022–2026): Unexpected UAC prompts caused by MSI repair hardening.
• OBS Studio + NDI: Severe lag due to RUDP protocol issues.
• Windows 10 22H2: The final version, receiving only security patches until support ends.

What you should do:

• Always apply the latest cumulative updates.
• Use the suggested OBS/NDI settings to minimize lag.
• Plan ahead for a smooth transition to Windows 11.

By staying proactive, users can avoid productivity loss and keep both creative and professional workflows running smoothly.

Looking for more troubleshooting tips? Check out these guides:

・Fake CAPTCHA Scam: “I’m not a robot” Used to Spread Malware – How to Spot and Stay Safe

・Gemini Not Starting or Logging In (August 2025): Causes, Fixes, and Alternatives

・How to Show Hidden Files and Folders in Windows 11 (and Windows 10)

タグ: Windows 10, OBS Studio, Windows Update Issues, KB5065429, NDI lag, AutoCAD UAC, RUDP, MSI repair hardening, Windows 22H2 final version