Try this
Windows Vista or Windows 7 installation CD/DVD (and also Windows 8, I tried this personally)
Boot from Windows Vista installation disc, select language and keyboard or input method, click Next and choose to Repair your computer. Then you will need to select the operating system that you want to repair. In the System Recovery Options dialog box click Command Prompt and type the following:
Bootrec.exe /FixMbr
Bootrec.exe /FixBoot
If you want to completely rebuild Windows Vista Boot Configuration Data, then you should issue the following command:
Bootrec.exe /RebuildBcd
This command scans all disks for installations that are compatible with Windows Vista. Additionally, this option also allows select the installations that...