The operating system uses the driver to communicate with a hardware device such as a printer, video card, sound card, network adapters, etc. General Information What is a device driver?Ī driver is a small but essential piece of software written for a specific operating system like Microsoft Windows 10. Warning: Downloading and installing device drivers or software from unknown sources may cause the device not to work correctly, cause your PC to crash or not boot into the operating system or sometimes even infect your PC with a virus, trojan or other malicious software.