Due to its legacy status, accessing the official installer can be challenging if you are not a registered license holder. mdk474.exe link broken - Keil forum - Arm Community
: It is often used for development on older ARM7, ARM9, and early Cortex-M devices where newer "Software Packs" used in MDK v5/v6 may not be available or compatible. Core Features of MDK-ARM v4.74 mdkarm version 474