I've got MS DOS 7.10 (standalone build from 1999, can't remember where I got it) on my Vaio on a 500MB partition which contains the i386/ folder from Windows 2000 Professional. On running winnt.exe, it copies the Win2K files to my 20GB empty FAT32 partition. It however doesn't set the partition active or rewrite my MBR to a state where I can boot to the next stage of the installer - my BeOS bootloader is still present when the software reboots the computer. I've tried with the target drive as a primary partition and a logical partition, tried having a 2GB FAT16 target partition to see would that help (not that it matters, as MSDOS7 supports FAT32 anyway), etc, etc This machine has no floppy drive and no CD drive and Windows RIS is not an option due to other data on the drive. Any suggestions as to why winnt.exe isn't working right?