(VXD) A device driver under {Windows 3.X}/{Windows 95} running as part of the {kernel} and thus having access to the memory of the kernel and all running processes as well as raw access to the hardware. VXD' s usually have the filename eXtension .386 under Windows 3.X and .vXd under Windows 95. VXD' s written for Windows 3.X can be used under Windows 95 but not vice versa. (1997-02-27)