|I have tried this (the mouse and the keyboard are not on USB), so I had nothing on the 4 USB available.|
I reput the USB function in BIOS, the system started, worked for a while, then the error sound appeared and the system freezed.
So honestly, now I work with the USB function disabled, and the system is stable. I use email to transfer files to the computer, as I cannot use any external HDD (conectable on the USB).
The greatest problem I have is with the printer, HP 990 cxi, which has only USB cable to connect to the pc, so I print from the laptop...