ModPack creators, please be sure to read the last item!!

NoRespLoadFix

A client-side Minecraft mod (Fabric / Forge / NeoForge) that prevents Windows from showing the "Not Responding" dialog during high-load operations such as modpack startup, texture reloading, world loading, and language loading.

Note: In the overview, I referred to this as a “modpack” for the sake of simplicity, but due to the way it works, it can essentially resolve the issue of unresponsiveness during high-load tasks in Minecraft.

Compared to the legacy edition, the features themselves have not evolved. What changed is the toolchain: combining Architectury API with Stonecutter made multi-version and multi-loader support far easier, which in turn makes active ongoing development practical.

How It Works

Uses DisableProcessWindowsGhosting() — a Win32 API provided by Microsoft for exactly this use case — to permanently disable OS-level window ghosting for the process. Where available, this is applied early (e.g. via Forge/NeoForge ITransformationService or Fabric preLaunch) before most Minecraft code runs — including the early loading window — so coverage starts as soon as possible. A secondary heartbeat thread (PostMessage(WM_NULL)) runs as a lightweight fallback throughout the game session.

Layers of Protection

Compatibility

• Does not call any GLFW functions from background threads
• Does not hook WindowProc or intercept messages
• Compatible with Embeddium(Rubidium), ModernFix …etc optimization mods

Requirements

• Minecraft 1.16.5 ~ 26.1.2 Fabric / Forge / NeoForge
• Architectury API
• Client-side only

⚠️ Important Considerations & Best Practices

Masking Real Issues

This mod works by notifying Windows that the process is still alive, even during heavy loading states. While this successfully prevents the misleading "Not Responding" white screens, it has one architectural trade-off: If a genuine infinite loop, dead-lock, or serious crash occurs in your game, Windows will not detect it immediately. The mod will continue to report the process as active, which may delay your awareness of a real freeze.

Recommendations

• For Stable Modpacks & General Players: Highly recommended. If your modpack is already stable, this mod perfectly eliminates frustrating false-positive dialogs during heavy startup operations.
• For Modpack Developers & Alpha Testing: Use with caution during active debugging. If you are frequently changing mods or troubleshooting experimental configurations, you may want to temporarily disable this mod to receive immediate feedback from the Windows OS when something genuinely breaks.