Instruction video showing how to program your VE.Bus product in VE. On computers with internet, Windows will automatically download the correct driver itself. To install the MK2-USB / MK3-USB driver on a computer without internet, first download the MK2-USB / MK3-USB driver using VEConfig3 and install it by selecting the menu Special -> USB Drivers. Only afterwards connect the MK2-USB / MK3-USB to your computer for the first time. USB driver installation program for MK2-USB / Then search for the latest Bluetooth driver for your Windows PC. To save your time and manual effort, you can utilize a driver updater tool such as the Bit Driver Updater. To download & update Realtek Bluetooth driver: Method 1 Manually: You can update Realtek Bluetooth driver manually by going to the official website of your computer manufacturer. The above-described manual process is time-taking and cumbersome. VEFlash (v9005163) - Firmware update tool to update VE.Bus products Automatic Approach for Bluetooth Peripheral Device Driver Download.VE.Bus System Configurator (v9009154) - For larger installations.VE.Bus Quick Configure (v9010154) - For installations up to 3 Multis.