Epic Games Launcher - Prerequisites failed to install
This error is generally caused by one of two things. The first is a prompt requesting administrator access. If you ignore, don't see, or deny this request, the install will result in this error. You should be able to solve the issue by uninstalling and reinstalling the launcher.
The other possibility is a problem with the existing Visual Studio redistributables on your machine. In this situation, the following workaround should solve the problem: