My arduino uno is not working

My pc dosen't recognize this board. I have tried to bootloader it, but isn't working. I need to buy another one? Or exist a solution?I will upload an image when it is connected to the pc!

By "doesn't recognize", do you mean that you don't get a COM port for your Uno when you plug it into your computer? If so, burning the bootloader will not help with that problem.

pert:
By "doesn't recognize", do you mean that you don't get a COM port for your Uno when you plug it into your computer? If so, burning the bootloader will not help with that problem.

Yees. A while it was recognized by pc, but when i have tried to upload a code, dosen't work.. and after.. when i plug it :"USB DEVICE NOT RECOGNIZED"..

See what you can discover by running Windows Device Manager.

Once started, open the tab "Ports (COM & LPT)". Is your device listed?

jpom:
See what you can discover by running Windows Device Manager.

Once started, open the tab "Ports (COM & LPT)". Is your device listed?

NO

This is how my UNO is listed under the Ports tab (it doesn't actually say "UNO"):

"USB-SERIAL CH340 (COM 9)"

Unplug the UNO and replug it. Does Device Manager react or remain unchanged?