The version 5.92 of KB890830 installs just fine for me when I install it through windows update for some reason. When I try to install it just by running the exe from the catalog I have no luck. I even tried to pull the exe from the software distribution folder after wu installed it. It was the exact same file as the one from the catalog and I got the exact same system check error when i run it. The system where I checked most recently was on Vista64 Ultimate with WUC patch set to 2 (WUC patched as Server 2008 only). All the previous updates was installed with the the KB4580971 installed exactly before KB890830.
I checked on a Business 32bit and the EditionID registry entry is already "ServerStandard" (Probably because the WUC Patch is set to Server 2008?). Anyway I wouldn't care much but it seems that Windows Update is not offering the ESU Updates unless I install the mrt. They install fine manually though.