Unreal crashes/refuses to open (Edit, now it opens but won't update)

Development Platform & Builds
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1

I tried opening Unreal Engine 4 today and it doesn’t open at all. It just crashes before it even opens, throwing me into an Unreal Engine 4 crash reporter. Here is what the event logger says:

Faulting application name: EpicGamesLauncher.exe, version: 2.8.3.0, time stamp: 0x568ec908
Faulting module name: libcef.dll, version: 3.2357.1291.0, time stamp: 0x55df84b5
Exception code: 0xc0000005
Fault offset: 0x00000000000f43d9
Faulting process id: 0x33f8
Faulting application start time: 0x01d17fca8efbb90b
Faulting application path: C:\Program Files (x86)\Epic Games\Launcher\Portal\Binaries\Win64\EpicGamesLauncher.exe
Faulting module path: C:\Program Files (x86)\Epic Games\Launcher\Engine\Binaries\ThirdParty\CEF3\Win64\libcef.dll
Report Id: a1f82094-ca63-44ce-bec7-421eb6b5bb39
Faulting package full name:
Faulting package-relative application ID:

How do I fix this issue?

P.S. I have no idea if I have version 4.7. I just selected it.

2

Hi MadDemon64,

Can you provide more information about this crash?

  1. Did the Launcher used to open but now doesn’t?
  2. Are you able to open a project by double-clicking on the uproject? (Documents/UnrealProjects/YourProject/ YourProject.uproject)?

Please delete these folders from your UE4’s installation directory:

  1. Intermediate
  2. Saved
  3. DerivedDataCache

After deleting those folders and restarting the Editor, if that does not fix the issue, please provide as many of the following as possible:

  1. Your dxdiag (Windows Start Button>(search “dxdiag”)>Launch dxdiag>select “Save all information”>attach text file to your post.)
  2. If the Crash Reporter window is present when the crash occurs, select “Copy Callstack to the Clipboard,” and paste that information in a document and add to this post. Be sure to hit “Submit” on the Crash Reporter pop-up to send the Crash Report to Epic.
  3. “UE4.log” Located: Engine\Saved\Logs\
  4. “ProjectName.log” Located: ProjectName\Saved\Logs\

Providing this information and appropriate logs will help us track down and isolate the source of the bug as quickly and efficiently as possible.

Thanks for your cooperation,

.

3
  1. Yes, it used to open before I upgraded to Windows 10.
  2. I do not have any projects
  3. I do not know where to find the Intermediate, Saved, and DerivedDataCache files
  4. The crash reporter does not list any callstack and I do not have a UE4.log or ProjectName.log
  5. I have attached the dxdiag

Also, when I went looking for the files, I tried experimenting with the different launchers, using the 32 bit instead of the 64 bit. Now it does open, but I get a “Update failed: A file corruption has occured. Please try again.” message.

4

Would a fresh reinstall of Unreal fix my problems?

5

Upgrading to Windows 10 is the major factor here… You will want to make sure you have the latest updates for Windows 10. Then install/reinstall the editor from scratch. If you experience issues installing UE4.10 on Windows 10, you may need to follow the instructions from this link: Cannot Install on Windows 10

6

Thanks I will try that.

7

And it failed to installed.
“The necessary prerequisites have failed to install. Error Code E-1223”

Edit
Nevermind. Tried installing it again and it worked.