Can't manually install arduino drivers and neither use the arduino uno

I just bougth my first arduino, an arduino uno, and i can't connect it with my pc. It just don't detect it. So i investigated and found some topics about the drivers so i followed the steps said here to install manually the drivers. I reinstalled all the software, followed every step, but nothing. I'm desperated. Please help. When i try to install manually, it says "windows could not install your usb2.0 serial".
Thanks in advance

That is a CH340 based device and you need the drivers FROM HERE

You didn't mention the OS so I would advise to install as ADMINISTRATOR

Sorry i'm new here, on OS windows 10, i do try it as administrator (i cannot otherwise)
thanks

just done. But when i try to upload a program, it says that the system can found .....

NEVERMIND
Just changed the port while searching the problem said when i realized that maybe changing the port would work and it DID
thanks you so so much, really

(just to clarify, i tried to change the port, i mean i tried after doing what you said and doing the driver update)

All good you are up and running.