Windows7Next

Following Dell printers are not compatible with Windows 7 operating system
Dell Printer Model Number: 540, 720, J740, A920, 922, 924, 928, A940, 942, 944, A960, 962, 964, 1500, S2500 and S2500n

Dell provides customised computer technology solutions and services to businesses and home consumers always supports latest OS. Dell is also finalizing Windows 7 support for a variety of its existing products, which will be available on Dell.com.
A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware connects. [...]