13.1. Why Do You Need a Dynamically Loadable Driver?
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. WinDriver is a dynamically
loadable driver, which enables your customers to start your application
immediately after installing it, without the need for reboot.
You can dynamically load your driver whether you have created a user-mode or a
kernel-mode (Kernel PlugIn ) driver.
To successfully unload your driver, make sure that
there are no open handles to the WinDriver service (windrvr1230.sys or
your renamed driver [15.2]), and that there are no
connected and enabled Plug-and-Play devices that are registered with this service.