Unreal installer doesn't complete without error

Why does unreal installer not complete install without error?
Recently I built a desktop computer using Windows 7 64bit Home since unreal engine requires a 64bit Operating System. I formatted hard drive then re-installed Windows 7 64bit but unreal installer still didn’t finish installation. There is no errors in the Windows logs. I removed the ATI 1GB video card and installed MSI 2 GB 64bit video card. It works now so I believe ATI card was 32bit.

Hi cpkennedy,

I’m sorry that you are having an issue with the Epic Games Launcher. In order for us to offer the best support, we have recently modified the process for how Epic Games can help troubleshoot your Launcher issue. Please visit http://help.epicgames.com/ for technical support, here you can find information and solutions for common issues, as well as a contact form if you still need additional assistance. To access the contact form, please use the “Email Us” button under the “Contact Us” section. Thanks!