Try using the repair option from the Vista install disk. If the 'Black Edition' disk doesn't have the repair option. Go here. " ttp://neosmart.net/blog/2008/windows-vista-recovery-disc-download/" . You can make a repair disk yourself. It's around 120mb to download. Good luck
Boot with Vista's installation disk. Choose Repair, Selecet the primary Vista partition and click Next. Once the repair window appears, open CMD(Command Prompt) and type: bootrec /fixmbr bootrec /fixboot Now restart the computer and boot to Vista...