Dang you are probably the first one to fail with that method....
K win 7 so double check all your win7 updates. as there was one that caused USB to go off the rails.
That was quite some time ago but As I recall rolling back that fixed some of the USB problems.
There was also another thread where the OP reported rolling back the hardwares USB 3 driver too and that was another winner as a few did that.
BTW still waiting for a picture of your board near the USB connector It may be a PITA to get but could provide the key.
I can't provie a pciture of it, it is enclosed and glued
Maybe should I mention that a fake arduino from chian works with their own driver...
But the thing is that the arduino is well recognized, so I don't know if it is due to hardware stuff ?
I think you were correct to try to install the driver manually and should think about the error and fix that. Are you using Administrators account? Latest software? Can you try another Arduino/Computer/Download?
Yes I do everything as an admin. I even tried the hourly release of Arduino, can't try other arduino, but chinese one with its own driver works...