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

NoRespLoadFix

A Minecraft Forge mod 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.

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. This is applied via a Forge ITransformationService, which runs before any Minecraft code (including the early loading window), ensuring coverage from the very first moment.

A secondary heartbeat thread (PostMessage(WM_NULL)) runs as a lightweight fallback throughout the game session.

Layers of Protection

Layer	Mechanism	When Applied
1 (Primary)	`DisableProcessWindowsGhosting()`	Before the loading window appears
2 (Fallback)	`PostMessage(WM_NULL)` thread	From client setup until shutdown

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

⚠️ 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.

Requirements

Minecraft 1.20.1
Forge 47.x
Windows (no-op on Linux/macOS)
Client-side only