Here is the instruction on installing and activating Carprog V8.21 perfect online version China clone on Windows 7 operating system by obdii365.com engineer.   Software version: V8.21 Free download carprog v8.21 perfect online software (Disable anti-virus software) Optional operating system: Windows XP, WIN7, WIN8, WIN10 … Continue reading How to install and activate Carprog V8.21 on Win7