I have a laptop HD where I couldn't access my C (20Gb). The HD was divided in 2 partitions : C and D. So with the help of a PartMagic setup diskette I managed to free some 2Gb space on the D partition and created a third partition E behind the D. From my installation CD I installed with the help of my internal DVD-Rom player another OS XPPro on the E. From within my E partition I could access my C and managed to save all my data and exported that to an ext. drive. Now I want to make a repair installation on my C (some 4kB of data was corrupt and I couldn't login). Only problem is my built-in DVD-Rom player suddenly can't read my installation CD any more; and my bios doesn't support USB. So I can't install the OS from boot directly on the C partition. When I put the installation CD however in an external DVD drive that I access from within my E there's no problem starting the XP setup installation. However can I overinstall (repair) my damaged C partition from within my E partition ? Will this work ? Which steps should I choose to make the repair on the C partition from within the active E partition ?