My friend purchased a brand new hard disk of 80 gb . Thing is that I formatted and partition it in my system n copied few files to his hard disk . N when he went home n installed the hard disk in his system to load xp os . The bootable cd loads n when it says starting to load i.e before partitioning . A blue screen appears which says DISK IS UNMOUNTED 00000000000XXXXXOOXOX. And then restarts. Is this problem of hard drive or any bios problems or is it a os problem :(