On two computers, Windows 10 64 bits, up to date, 8Go RAM, SSD, administrator account, Visual Studio 2015 Community with Update 1.
I’ve tried dozens of times to update for UE 4.10.3, and then 4.10.4 but always failing repeatedly with E-1223.
I’ve been using all tips I could gather on AnswerHub (uninstalling prereq, uninstalling ms redist, runing UE prereq installer by command line with the same command line found in the logs…)
In the past, I had to do that to install UE 4.10, then Update 1 and 2, but this times it is a lot harder for me (as reported also by other users). This is quite ironical as update 3 should have bring a fix for this issue…
This evening I’ve finally succeeded by executing Launcher in administrator mode and that is why I report here, because I’ve seen a fix in a changelog about “not trying to install prerequisites if account has no administrator rights” and so I thought this report could be useful.
I’m sorry to hear you are having trouble. It seems that you’ve covered all of the standard steps, but could you please try the follow steps in the following order:
Manually download and install DirectX from here: Link