At the bottom of menu.lst or winsetup.lst (I can't remember) change the line that reads root (hd0,F:) to root (hd0,0) or even better find --set-root /winsetup.lst. This should solve your problem. Edit: Here's some files for you. txtsetup.sif (for ISO), setup.cmd, menu.lst and winsetup.lst I replaced root (hd0,F:) with root (hd0,0) in menu.lst. Now wasn't errors. I selected first installation part. But it wants to install OS to my HDD. He asked do I want repair or reinstall my C: disk OS. Now was not possible select on which partition I want install.