Reset XP Admin Password

Reset XP Administrator's password using Linux Backtrack Live CD
1. umount /mnt/hda1
2. modprobe fuse
3. ntfsmount /dev/hda1 /mnt/hda1
4. cd /mnt/hda1/windows/system32/config
5. chntpw -i sam system security
6. choose Administrator id
7. Enter new password or * to reset blank

Note :
above example is for NTFS partition. If not, use these commands:
umount /mnt/hda1
mount -o rw /dev/hda1 /mnt/hda1