On another machine the program runs fine. I use the same USB-Stick on both machines. So i think the problem is related to the windows version, but both systems run XP Pro SP2 fully updated in english. Maybe someone have an idea??? Thanks and greetings... HKCU [EDIT] Found the mistake.... I had two folders USB_MultiBoot2 on my harddrive. After i deleted one, everything went fine Great work guys! [EDIT END] I am experiencing the same problem, but I have not been able to resolve it. The command window simply closes itself after displaying "Make Bootsector Files in btsec Folder ....".