During the Windows 2000, XP, 2003 timeframe there was an old tool Hardware Compatibility Test (HCT) to certify devices. When Windows Vista was released the tool was replaced by Driver Test Manager (DTM) which can certify drivers for all then-supported platforms. At that time DTM was part of Windows Driver Kit (WDK). Later DTM was separated from WDK and changed its name to Windows Logo Kit (WLK). For Windows 8, the name was changed to Windows Hardware Certification Kit (Windows HCK), as announced at the //Build/ conference. Subsequently, its name was once again changed into Windows Hardware Lab Kit (Windows HLK) for Windows 10 release, intended for testing of hardware and drivers on Windows 10 platform. The Windows Hardware Certification Kit continues testing hardware on Windows 7, Windows 8 and Windows 8.1 (and their server products respectively) platforms.