Follow these steps to install the WDK on a Windows 7 machine:
Latest API definitions for kernel-mode (WDM/KMDF) and user-mode (UMDF) drivers.
In Windows 7, you can right-click the ISO file and select Mount (if you have third-party software like Virtual CloneDrive) or burn it to a DVD.
If you are developing drivers for Windows 7, Windows Server 2008 R2, or legacy systems like Windows XP and Vista, the is the essential toolset. Although Microsoft has moved to modern, integrated WDKs for Windows 10/11, the 7.1.0 version remains the definitive kit for that era of operating systems.