Everything was going well until I decided to updated from 4.10 to 4.10.2 through the launcher. Ever since then, I have not been able to get a fully successful install and now I cannot even regress back to 4.10.0 or 4.10.1 as they are no longer present on the list.
NOTE: UE 4.9.2 still works without any issues.
The first issue was related to drive space. I followed the instructions that epic listed on how to copy and create links to my launcher data. That freed up tons of space and I was able to continue further through the installation process until I hit another snag.
The error message I receive is related to the “prerequisites” error code R-1638. After digging through some of the posts related to this problem, I followed various instructions that included: uninstall Windows Visual Studio 2015 and redistribution x64 and x32; uninstalled and reinstalled ue4 4.10. I still have not reinstalled VS 2015 as yet.
At the present time, these did not work. I verified that I do have the latest windows 7 64bit updates.
I read another post that recommended installing the prerequisites manually located at C:\Program Files\Epic Games\4.10\Engine\Extras\Redist\en-us. I ran this installation and then resumed the installation process via the Launcher. After verification, it stated that it was installing the prerequisites but failed once again with error code R-1638… frustrating!
Hey, if you’re still having this issue I figured it out. I tried uninstalling the redists and prereqs, updated my windows version and even uninstalled the engine and stuff and still couldn’t figure out what was wrong. If you have the 4.11 previews set up and are getting the R-1638 issue you’re going to have to go into the 4.11 folders and navigate to C:\Program Files (x86)\Epic Games\4.11\Engine\Extras\Redist (unless you saved it somewhere else) and uninstall your prerequisites. Then go and re-install your prerequisites in my 4.10 folder located: C:\Program Files (x86)\Epic Games\4.10\Engine\Extras\Redist\en-us (unless you have a specific install location) and re-downloaded the engine version from my launcher and everything worked.