Issue Related To Serial Monitor and Upload Code

i Have system of Windows 10, i5-7400 processor, 16GB RAM and 1060 6GB graphics card.
I am working with Arduino Uno R3. It give error while uploading a program to it ,
error is-- avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x82

Also i found that when i disconnected the Arduino board from my PC and then upload the code into board

  1. the error was getting like
    avrdude: stk500_recv(): programmer is not responding
    avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x82

"But i think the actual error was something user board is not connected" something like that

  1. Also Serial monitor window will open even if i don't connect Arduino Board to PC.

Most importatnt point is if board is not connected to PC then Serial Monitor will not be open but in my case Serial Monitor Will open. I reinstall Arduino IDE and then try same thing and the result was same.

Please help me, I cant under where the actual problem is.

Do you see the Arduino in the ports list ? ( tools/port)

Are you using the correct data type USB lead , not a charger one ?

Is it a genuine or clone UNO?