Hi,

I have Dell XPS 13 ultra book.

1. My USB 3 doesn't function, I see under device manager: 

fresco logic xhci (usb3) root hub: This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)

I already download the neewest drivers from Dell website, and resolve the problem but after a few days the problem come back, What can I do ?

2. When I shutdown the computer, after turning on the bios sutck sometinems on Dell logo screen (bar on half progress), I have to turn on and off.

Why does it happen ?

My BIOS is the most updated

Regards,

Chipopo