You must temporarily disable your antivirus software (including Windows Defender). Many security programs flag diagnostic tools as "false positives" and will delete critical files from the .rar archive during extraction.
Buried inside Setup VAG K CAN Commander 1.4.rar is the software that keeps thousands of older Volkswagens and Audis on the road. It isn't pretty, and it isn't modern, but for reading PIN codes, adapting keys, and accessing immobilizer data on K-Line and CAN systems, it is indispensable. A must-have archive for any serious VAG toolbox. Setup VAG K CAN COMMANDER 1.4.rar