Which (Windows 7, 10, or 11) are you using?
KTAG requires a 12V power supply for most ECU operations. Even if the software opens via USB, you won't be able to read an ECU without the 12V adapter plugged into the KTAG unit. Update Ktag Clone From 2.25 To 2.70
How to Update Ktag Clone From 2.25 to 2.70: A Complete Step-by-Step Guide Which (Windows 7, 10, or 11) are you using