arduino mega 2560 usb not recognized

Please help.

I have a new arduino mega 2560 but it does not work. Because usb not recognized.

Nothing works.

I uploaded ch341ser.exe but the same again.

Please help.

by the way, I dont speak english . Only a little. I'm sorry.

Have you tried locating it in device manager? Is it a genuine board, or a Chinese clone? What USB-to-Serial chip does it have? What do you mean by 'uploading' ch341ser.exe?

fako:
by the way, I dont speak english . Only a little. I'm sorry.

If English is a problem, you can try the international subfora, to get help in your own language.

Pieter