carprog 8.21 Perfect Online Version needs to be activated before using it to read & write ECU. Firstly got one carprog 8.21 Perfect Online Version here http://www.obdexpress.co.uk/wholesale/carprog-full-new-firmware.html Next step is to install and active the carprog 10.93 software, the operation video was shared on Youtube: How to active carprog 8.21: Create a…