Keep in MIND that a GATEWAYPENTIUM 4 has no operating system. 1. Is it possible to boot into MS-Dos from a CD? 2. Is it possible to RUN Fdisk? 3. How do I delete the MBR?If you have no operating system there is no MBR to delete.You can boot to a bootable cd, yes. If that bootable cd contains fdisk. exe then you can run fdisk.