WDM drivers are installed via the installation of an INF file (see below). Windows 7 and higher uses Windows Driver Model (WDM) drivers - files with the extension *.sys (e.g., windrvr1511.sys). To successfully unload your driver, make sure that there are no open handles to the WinDriver service ( windrvr1511.sys or your renamed driver), and that there are no connected and enabled Plug-and-Play devices that are registered with this service. You can dynamically load your driver whether you have created a user-mode or a kernel-mode (see Kernel PlugIn in Chapter 12: Understanding the Kernel PlugIn) driver. WinDriver is a dynamically loadable driver, which enables your customers to start your application immediately after installing it, without the need for reboot. When adding a new driver, you may be required to reboot the system in order for it to load your new driver into the system. Why Do You Need a Dynamically Loadable Driver?
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