Hi all! I prepared my USB Harddisk with "USB_MultiBoot_10". - XP can be started and works 100% unattended. - VISTA start OK via GRUB4DOS but installation is not unattended. If I'm installing my VISTA source only to any USB Stick/Hdd it's OK and 100% Unattended. Any idea why when starting from GRUB4DOS it doesn't work as well when installed alone? Thanks you for help ;-) l8r! --- Here is the root of the USB ---