Unreal 4.3 Install Failed "The Installation is Corrupt"

After installing the launcher, disable antivirus and many other steps suggested by support, I still can not use the unreal 4.3. Once in a minimum 4 “Verifying”, 3 “downloads” I still can not use the engine or test my signature SpeedTree. I really would like to know how to proceed?

Hi Wulfrick,

I am sorry to hear that you are having this issue. To make sure that I understand the problem, when you click the yellow “Install” button for 4.3.1, you get a message that says “The Installation is Corrupt”, is that correct?

What happens if you then use the “Verify” option from the dropdown menu?

It may be helpful for us to take a look at the logs that are generated while the issue occurs. Please close the Launcher, and follow these steps:

Navigate to this location:
C:\Program Files\Unreal Engine\Launcher\Engine\Programs\NoRedist\UnrealEngineLauncher\Config

Open the file DefaultEngine.ini into Notepad. At the very end, add the following (without the bulletpoints):

  • [Core.Log]
  • LogHttp=veryverbose
  • LogOnline=veryverbose

Save the file and make sure that it saves successfully with the changes.
Then, run the Launcher until it gives you the error message.
Close the Launcher again, and navigate to this folder location:
C:\users\USER_NAME\appdata\local\unrealenginelauncher\saved\logs
If you open the most recent log in the list, it should have a lot of information inside of it.
Place this log in a Zip file and attach it to your AnswerHub report.
After you have provided the logs, re-open the DefaultEngine.ini file, remove the lines you added, and Save. This will restore it to default logging and not generate such large files.

Thanks

Hi Wulfrick,

We haven’t heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you’re still experiencing this issue, please feel free to post back here with additional information.

Thanks, TJ