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How to fix Unreal Engine 4.18.1 stuck at Initializing 45%

When opening up Unreal Engine version 4.18.1 for the first time, it is stuck at Initializing.... 45%. I have Windows 10 Home and have a Toshiba Satillite L775-S7248. I have tried to delete the DerivedDataCache folder from the installation folder but it is still stuck at 45%. Please Help me.

Product Version: UE 4.18
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asked Nov 22 '17 at 02:11 AM in Installation & Setup

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MasterV2134
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avatar image salemtroy Nov 25 '17 at 01:15 AM

try your firewall its most likely blocked it. the same thing happen to me and that fixed it hopefully this helps

avatar image milanranchhod297 Dec 29 '17 at 11:11 PM

Thanks. It worked for me.

avatar image BlazeTheBest1 Feb 27 '18 at 02:47 PM

what do you mean; 'that fixed it'? do you give permission for the site to bypass the firewall or is there another technique?

avatar image milanranchhod297 Mar 01 '18 at 05:38 AM

I did it on a Imac and you just go to settings - security & privacy - firewall - give permission - turn off firewall. That's what I did on a Imac. To do it on a Windows you hold down the windows key and press x. Select system and security, then go to windows firewall, and press turn off. Also you could go on settings, and search firewall. Hope this helps.

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6 answers: sort voted first

It's not stuck, it takes a long time the 1st time round, just be patient.

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answered Nov 22 '17 at 08:11 AM

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Everynone
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avatar image MasterV2134 Nov 22 '17 at 08:09 PM

Thank You for your help, this worked. Another question is will I have to wait this long every time I open Unreal?

avatar image Everynone Nov 22 '17 at 09:47 PM

Nah, it should only be the first time. Depends on your machine, but with an SSD it does not take longer than 30s.

avatar image MasterV2134 Nov 22 '17 at 10:32 PM

How long would it take to initialize for first time use?

avatar image Everynone Nov 22 '17 at 11:00 PM

On a slow machine it can take even 30mins.

There's quite a bit of shaders to re-compile. You can hit Ctrl+Shift+Esc (Task Manager) and check if the UE4 is sitting at 100% CPU - this just means it has not crashed, it's just doing its thing.

Worry not, it's a pretty standard behaviour.

If your laptop does not have a dedicated GPU, you might not be able to launch the editor, though. Even if it does run, expect abysmally bad performance.

Hope it helps!

avatar image MasterV2134 Nov 22 '17 at 11:22 PM

My CPU usage is at 99% and just to clarify, this is also my first time opening UE4. So does it work the same way?

avatar image milanranchhod297 Dec 29 '17 at 11:08 PM

I think it does because my CPU usage is at around 80%, and this is my first time opening Unreal Editor.

avatar image MasterV2134 Nov 23 '17 at 03:01 AM

It has been 3 hours and it is still at 45%. What should I do? Should I just wait longer?

avatar image Everynone Nov 23 '17 at 08:39 AM

That sounds way too long. I had a look at the specs of the laptop you mentioned. The GPU is unsupported and it's way below the minimum required config.

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Thank You So Much And Love You And Wish you A good Luck You Will Be A Great Game Maker

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answered Jan 14 '18 at 06:36 AM

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Ghost Reborn
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avatar image sgrm8 Aug 06 '18 at 01:00 AM

Ghost Reborn You're really nice! :)

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Will it work if i download a lower version?

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answered Nov 23 '17 at 10:03 AM

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MasterV2134
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I have just installed the new 4.20.1 version on a 2012 macbook pro.

It took 45 mins to initialize for the first time. It froze at 35% for about 35mins.. Allowing Ue4 to bypass the firewall got it started again, sat at 45% for another 10mins then the rest was speedy.

The first time just takes a while.

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answered Aug 21 '18 at 12:37 AM

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BarkinMadGames
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I deleted some files that are in DefaultEngine data\Config\DefaultEngine I deleted r.DBuffer=False In the line of [/Script/Engine.RendererSettings] I can open it again

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answered Jan 06 '19 at 10:42 AM

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sopodream
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,Yes thats right it took 15m-20m on i7 7700k to open :). Just be patient

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answered May 17 '19 at 01:47 PM

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hackednorthkorea
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