To download version 5.25 or other specific previous versions, you must use the official .
You may find direct MDK 5.25 installers in archived technical notes or tutorials, such as the M4 Tutorial for STM32F4-Discovery which references www.keil.com/mdk5/525 Alternative Sources: If the above is unreachable, developers often use the WIZnet documentation site which provides direct links to MDK525.EXE (approx. 860MB). Installation & Setup Steps Run the Installer: MDK525.EXE and select the installation folder (default is C:\Keil_v5 Install Legacy Support: mdkarm version 525 download link
: Use the search functionality on the website to look for "MDK-ARM" or "Keil MDK-ARM". To download version 5
: Includes updated ARM Compiler 5 version 5.06u6. MDK Version 5.25 - Arm Keil MDK Release Note Installation & Setup Steps Run the Installer: MDK525
MDK 5.25 introduced several stability improvements and tool updates that defined the mid-v5 era:
The standard installation directory is usually C:\Keil_v5 .