If it's rebooting after displaying that message, your system partition is marked as "hidden NTFS". You can download a program called ptedit from PowerQuest for free. Boot to a DOS disk, run PTEdit, and change the "partition type" from hex 0x17 to hex 0x07.
fra post #9 i første link som bluedemon gav.
Læs lidt mere i tråden (i linket). Der er godt med info.