I FOUND THE ERROR !!!!!!
A few days ago I changed the firmware of Sapphire RX 480 Nitro + 8gb,
to do so I moved the switch to the side of the connections ...
by chance I came to my mind and I put af… (View Post)
I changed these settings in the Bios:
-Settings / Windows OS Configuration
--- Windows 8.1 / 10 = "Enabled
--- Windows 7 = "Disabled"
--- MSI Fast Boot = "Disabled"… (View Post)