I can't launch UE4.6.1 after uninstall, , reinstall

I bought Lenovo desktop and tried to download EU. It downloaded very slowly, and eventually it appeared for launch. When I tried to launch, it crashed and I attached screenshot. I thought that maybe they didn’t allow me to download it to second computer? No, I was told that I uninstall and and reinstall it. So I did. But same picture. I was able to download UE4.6.1, but cannot launch it.
I also checked my folder Program Files and I didn’t find UE4. Do is it a download problem… help please!

Thank you for your prompt response. Attaching DXdiag result screen one

Hi there,

Could you please post logs from this crash and you DxDiag on here so we can see what is causing error? You can find details on how to obtain logs [from answer to this post][1].

Thank you!


screen two.

Here is copy of call stack from crash reporter, which screen I attach again. Thanks.


Access violation - code c0000005 (first/second chance not available)

OVRDisplayRT64 + 22293 bytes
UE4Editor_D3D11RHI + 199098 bytes
UE4Editor_D3D11RHI + 373160 bytes
UE4Editor_RHI + 215660 bytes
UE4Editor_SlateRHIRenderer + 273389 bytes
UE4Editor_SlateCore + 872516 bytes
UE4Editor_Slate + 929057 bytes
UE4Editor_Slate + 962703 bytes
UE4Editor_Slate + 833332 bytes
UE4Editor_Slate + 770100 bytes
UE4Editor_Core + 2484124 bytes
UE4Editor_Core + 2400763 bytes
UE4Editor_Core + 2489275 bytes
UE4Editor_Core + 2387186 bytes
user32 + 9268 bytes
user32 + 8855 bytes
UE4Editor_Core + 2490486 bytes
UE4Editor!FEngineLoop::Tick() + 3434 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:2193]
UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:131]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

It looks like I launch UE4.6.1 but attached screen is staying for few seconds and then crash into a screen with crash report.

I also didn’t find UE4 folder in my Program files. Maybe hidden?


Are you running launcher version of editor or source version from github?

Thank you for , Devis. I guess I run launcher, because I click at icon in my desktop. I am just learning about github. Do you think I should try download UE4 from there? I am not a code geek though.

Okay, I tried to run it from Microsift Visual , and got stuck in “build” step. Any suggestions, pleeeeeeease!

Can you verify your build via launcher for me? To do so, start your launcher and go to “Library”. Then in dropdown menu press “Verify”. This will check to see if any files didn’t get installed onto your computer for some reason and install them if they are not there.


I did verify, but nothing came out of that.!
Then I tried to open a new project, at least it didn’t crash immediately as before.

but it crashed into error message I attach.
Where can you read results of verification?

I was not able to create any projects yet. So I don’t have such folder that you requested.

I wish I could just share my screen via skype to you and show what’s going on (aigul.ina).

My computer is new, Lenovo, and has tons of power. I could run Oculus Rift, some demos and I never expected that Unreal Engine won’t run. Now I don’t know if I should delete those UnrealEngine-release files, which I downloaded to try to run from visual , and do two of UE cointeract somehow.
Thank you for your time and consideration!


Don’t worry about VS files, they won’t interact. Let’s just get you set up with binary (Launcher) version of engine.

Look in this folder and see if there are any crash logs:

C:\Program Files\Unreal Engine\4.6\Engine\Saved\Logs

If so, please and attach them.


If you can, please up crash logs to new project you opened into a . file and upload that . here so I can take a look. To get to new project, please go to this filepath in your windows explorer:

\Unreal Projects\PROJECTNAME\saved\logs\

In my folder C:\Program Files\Epic Games\4.6\Engine\Saved\Logs
I found only one file UE4_Win64_MonolithicHeaders_Success text document, in which there is only one record “Just a record of success.”
If this is any help?

Nope. Try here:


You’ll need to paste that into address bar (AppData is hidden), replacing “UserName” with your system user name.


I am still waiting, guys, , Devis! Please help me!


Sorry for delayed response, most of us were out of office for last few days.

Let’s see if you can launch editor without using Launcher. Try opening UE4Editor.exe, found here:

C:\Program Files\Unreal Engine\4.6\Engine\Binaries\Win64

Okay, my problem is fixed. My friend came and downloaded latest graphic driver.
Thank you all for your efforts!