Microsoft?s User Mode Driver Manager service. At the time of writing this service gets installed on Windows XP when you either install Windows Media Player 10, or when you upgrade to Service Pack 2 for Windows XP. Introduced in September 2004. This service is part of the new device driver strategy from Microsoft for Windows 2000/XP/2003 and future versions of Windows : this strategy, the Windows Driver Foundation (WDF), aims to make it significantly simpler to write drivers for tomorrow?s Windows environments which hopefully will lead to higher quality and more reliable drivers; it also aims to ensure that, in future, buggy or badly written drivers will not have the detrimental or catastrophic effects that they have nowadays (freezes, instability, Windows not booting up, illegal operations, etc..); finally, the new strategy also aims to ensure that many more drivers will be installable without the PC needing to be logged in as ?Administrator? or with ?Administrator? privileges. Starting with Windows XP Service Pack 2 and Windows Media Player 10, Microsoft is adding the WDF framework to Windows 2000/XP/2003 to enable peripheral manufacturers to start producing WDF drivers. For technical users : this particular service, WDFMGR, implements the user-mode driver framework of the new WDF driver strategy. This framework enables developers to create drivers for network connected devices, and some USB devices, where the drivers run in user mode rather than kernel mode but still behave as standard Plug-and-Play drivers.