Error R-1603

With the release of the latest Epic Games Launcher, comes a new workaround for this issue. NOTE: This workaround only applies to issues with the launcher prerequisites installer(LauncherPrereqSetup_x86.exe or LauncherPrereqSetup_x64.exe). If you are having problems installing prerequisites for engines or other products, this is not the thread for you.

  1. Manually download and install DirectX from here:
  2. Install [Microsoft Visual C++ 2010 Redistributable Package (x86)][2]. On 64bit Windows also install [Microsoft Visual C++ 2010 Redistributable Package (x64)][3]
  3. Install [Visual C++ Redistributable for Visual Studio 2012][4]. On 32bit Windows install vcredist_x86.exe. On 64bit Windows install both vcredist_x86.exe and vcredist_x64.exe.
  4. Install [Visual C++ Redistributable Packages for Visual Studio 2013][5]. On 32bit Windows install vcredist_x86.exe. On 64bit Windows install both vcredist_x86.exe and vcredist_x64.exe.
  5. Install the latest Launcher and if you encounter Error R-1603 hit OK
  6. Right click on your Epic Games Launcher desktop shortcut and select Properties. Under the Shortcuts tab, find the Target field and add this to the end of it(pictured below): -SkipBuildPatchPrereq
  7. Double click the desktop shortcut.
  8. As soon as you are able to get into the launcher after self update completes, close it and remove the -SkipBuildPatchPrereq flag from your shortcut. Startup the launcher again.