Windows Driver Kit 8.1 Update 1 [upd]

Released alongside Visual Studio 2013 Update 1, this WDK occupies a unique niche. It was the last kit to fully support Windows 7 and Windows 8.0 without the "shimming" or complex configuration required by modern WDKs. For developers maintaining legacy hardware, industrial controllers, or specialized peripherals, this specific kit is not just an option—it is a necessity.