He opened Device Manager. The yellow exclamation mark was gone. In its place, under the "CAN Interfaces" category, sat: .
: USB descriptor mismatch or missing sys file. Fix : Re-run install.bat as admin. If persists, manually update driver in Device Manager → Browse → Let me pick → Have Disk → Select chuangxin.inf from repack folder. chuangxin tech usbcan driver repack