The most common cause for a freeze at 45% is the initial compilation of shaders. The Unreal Engine 4, which the Mod Kit is built on, is compiling visual effects for your specific hardware. The time this takes depends entirely on your processor, ranging from a few minutes on a high-end machine to an hour or more on a lower-spec one. If this is your first time launching, let it sit for at least 30-60 minutes before assuming it's frozen.
Users attempting to install the Mod Kit observe the progress bar reaching precisely 45%. At this point, the download speed typically drops to 0.00 MB/s, or the launcher enters a "Preparing" loop before eventually failing with an error message or remaining stuck indefinitely.
Select your fastest drive (SSD), click , and set the Initial size to 16000 (approx. 16GB) and Maximum size to 32000 (approx. 32GB). Click Set , then OK , and restart your computer. Summary Checklist 1 Wait 15–64 minutes while monitoring Task Manager First-time launches / slow CPUs 2 Delete %localappdata%\UnrealEngine\DerivedDataCache Infinite loops or stuck crashes 3 Update GPU to Studio Drivers Graphics/driver conflicts 4 Move kit to root directory ( C:\ ) Long path file errors 5 Run "Verify" in Epic Games Launcher Broken or missing installation files 6 Increase Windows Virtual Memory Pagefile PC builds with 8GB–16GB RAM
The most effective solution is patience. Depending on your computer's specifications, shader compilation can take anywhere from . [Solved] Unreal Editor loading stuck at 45% - #18 by Jambax hello neighbor mod kit stuck at 45
: Briefly turn off your Windows Firewall to see if the loading bar advances.
: If you have other mods installed, try disabling them to see if the issue persists. Some mods might conflict with the Mod Kit.
The Hello Neighbor Mod Kit is built on a modified version of . When the engine boots up for the first time, or opens after a major mod kit update, it must convert raw game materials into code your graphics card can understand. [Solved] Unreal Editor loading stuck at 45% - C++ The most common cause for a freeze at
Look for background processes named .
The 45% mark is the "handshake" between the Mod Kit and your computer's graphics card (GPU) and processor (CPU). The program is trying to compile shaders—small programs that tell your GPU how to render lighting, shadows, and materials.
Do not try these out of order. Start with Step 1, and stop when the problem is solved. If this is your first time launching, let
What are your computer's core (specifically your RAM and CPU )?
Find and uncomment the line ; r.XGEShaderCompile = 0 (remove the semicolon so it reads r.XGEShaderCompile = 0 ).
: This happens most frequently during the first launch after installation or after a major engine update.
: If the kit continues to freeze on subsequent launches, navigate to the folder with the mod kit, then go to Hello Neighbor -> Saved -> SaveGames delete the files Verify Hardware
: This process uses a large amount of your computer's processing power. You can verify this by checking your Task Manager for "Shader Compile Worker" processes. 🛠️ Troubleshooting Steps