On new Windows 11, Unreal Editor takes a very long time to popup loading window.

Development Getting Started & Setup
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After clean install of Windows 11 (from Win10), Unreal Editor (build from source) now takes a very long time to start. I can see it appear in the task manager, but nothing at all shows up on my screen for several minutes.

Back on Windows 10 I had no issues at all. It would show the loading window straight away with no noticable delay.

Is there some known Window 11 issues? I am using Unreal 5.3.0 built from source.
I love some some guidance or help pointing my in the direction of discovering the cuase of this odd issue.

I can of course provide any systme information needed.

This is a clean Window 11 install using BitLocker, on a system with the following hardware:

Ryzen 7 5800X3D, Gigabyte X570S Aorus Master motherboard, Gigabyte RTX 4090, 64GB of DDR4 RAM running in dual channel at 1800MHz with CL14 timing. Windows 11 and Editor build is on a Corsair MP600 CORE (M.2 NVMe PCIe Gen 4 SSD) with ~1.42TB free space remaining. I can see 50+GB of RAM available before trying to run the editor.

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I had an issue with the editor hanging quite a lot on W11, sometimes during startup, also during use.

I finally got rid of the problem after seeing a post about disabling the UDP and Studio Telemetry plugins.

This was on 5.4, though. 5.5 Seems fine…

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I built 5.5.1 from source, but it seems that same issue exists.

It will start out using about 4.5MB of memory and slowly climb in usage. It also shows minimal disk usage and 0 network. Still no loading screen at this time.

I don’t know if this is a Windows 11 issue or an Unreal issue. I suspect it is a Windows 11 issue made much worse by something Unreal does.

I have tried loading other programs like Steam or Gimp, but I have a normal experience with them loading. This points me further towards and issue with Unreal.

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I am thinking that perhaps it is an issue with the security software I use and Windows 11 reacting badly to the Unreal Editor due to how large and complex it is.

I use BitDefender (Internet Security).

I never had this issue on Windows 10, so it really stands out to me.

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I know what you mean. I use a VPN, and everything takes forever with that. As if it’s looking everything in a whitelist.

So, I just don’t use them at the same time.

I’m pretty sure the telemetry thing did make a difference.

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Hi There

I don’t know if it’s still relevant…

What helped me was adding two lines of code to all “*.Target.cs” files at “\UnrealEngine\Engine\Source”:

ExtraModuleNames.Add(“UnrealGame”);
ExtraModuleNames.Remove(“StudioTelemetry”);
ExtraModuleNames.Remove(“EditorTelemetry”);

Now the loading time is ~20 seconds, instead of 40 minutes :slight_smile:

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I was able to fix this by turning of this setting:

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