I have the blue screen, with the problem Unmountable_Boot_Volume
STOP: 0x000000ED (0x86B56900, 0xC0000006, 0 × 00000000.0 X00000000)
I'm trying to recover from the XP installation CD, but it says (translated from Spanish): "The partition is full, unformatted or formatted with an incompatible file system. To proceed, the Windows Setup must format this partition "
Is there any way to fix it without formatting?