Thank you akcent for your quick reply, i have edited my last post, could you review again please ? And do you mean that i have to modded bios through DOS? how can i do that ? could you give me a helpful link in order to understand process pls ?
click _USB-STICK.exe, click write - create USB-Stick. Boot to DOS (At initial boot in boot-menu or in BIOS to specify priority USB-Stick (USB-HDD) ) Type command BIOSBAK and press <Enter>