Trying to fix up two computers. one is a pen 4 and cannot get past 'disk failure insert system disk.' have tried everyhting i and a friend from this forum know but still no good. I have checked that CD roms and DVD work properly, the bios is set to boot from CD, FLOPPY then HD0. CD is set to master. Hard drives are set to master. all jumpers set to master or slave where appropriate the second computer is a pen 3 and it tells me NTLDR is missing - what does this mean? E.