Once the computer restarts, connect your plotter via USB. Windows often won't know what it is yet. Device Manager and look for "Other Devices" or "Ports (COM & LPT)". You are looking for a device typically named USB-SERIAL CH340 Note the COM Port number
The GoldCut JK Series typically operates via a standard USB 2.0 interface, though legacy models may support RS-232 (Serial) connections. driver plotter goldcut jk series top