I have a HP notebook(XP Home) that stop booting windows a while back after it crashed during an SP2 install. It does not boot from any mode in the advanced menu(safe, command, last known good config, etc.). I can't boot from my Knoppix disk because it says that there is a checksum error, even though I can boot from the same Knoppix disk on my desktop fine. Mind you this laptop has only a CDRW/DVDROM combo drive, no floppy or zip. I finally found my XP setup cd recently and tried to boot from it to perform a repair or access the recovery console, if it's possible. The problem is it won't even boot from that. It gives me the "NTLDR missing, press ctrl+alt+delete to restart" message when I boot from the Win Xp setup cd. I have read about some of the solutions involving a floppy boot disk, but I only have a cdrw/dvdrom combo drive to work with. Anybody have any ideas how to resolve this so I can boot the setup disk and run a repair?