Windows Hardware Lab Kit
The Windows Logo Kit (WLK) is a test automation framework provided by Microsoft to certify devices for Windows.
It provides automated scheduling and execution of the driver tests that hardware vendors are required to pass in order to qualify to use the Microsoft Designed for Windows Logo. Besides, it also enables users to automate driver tests which they have created themselves. These tests can be mixed and matched with the Logo tests provided by Microsoft to create a custom test pass enabling organizations to use the DTM to validate drivers in any way they see fit.
Driver Test Manager (DTM) was the old name of WLK when it was part of the Windows Driver Kit. Now WDK and WLK are separated from each other.