Version 4.12 launcher does not install

I downloaded ue4, when it run everything goes well but at the start of the installation of version 4.12.3,
After a 30 or 40% stops the installation with an error. at first, he asked me .dll files, after installing these files, I try to install again but remains the error, begins the installation a moment and then tells me that epic games to stopped working and stops the installation. e tested other earlier versions but I can not install the program.

my system is;
processor AMD A8 7600 Radeon R7 10 compute cores. 4 c + 6G 3.10 GHZ
8GB RAM
SO Win. 7-64 bits.

another error that appears is this,
Epic Games to stopped working,
Windows is looking for a solution.

and the following image appears:

Hi DIEGO2016,

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!