The process of downloading the Microsoft Wired Keyboard 400 Driver 9.3.139.0 for Windows 8 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Microsoft Wired Keyboard 400 Driver 9.3.139.0 for Windows 8 driver from the primary server - this is the manufacturer’s Microsoft official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the Microsoft Wired Keyboard 400 Driver 9.3.139.0 for Windows 8 diver.