Vista partition unbootable since Win 8 install

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I have had Vista 64-bit OS installed on an existing primary partition.

Due to curiosity I decided to check out Win8 and installed Win8 64-bit on a separate primary partition on a different hard-disk.

However since doing so I am unable to boot to Vista. Furthermore, all the usual system settings don't have the Vista OS available as a bootable option.

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I'm very sure I didn't delete or overwrite the Vista partition, the above Disk Management picture shows this. The red boxes are the Win8, and the green boxes are the Vista. I am also still able to access the contents of the Vista partition via Explorer from within Win8.

What can I do to allow the computer to recognise Vista again as a default boot option?

Thanks for any help
 

My Computer

System One

  • OS
    Vista & Win 8
    CPU
    Intel Q9450 2.67GHz quad
    Motherboard
    Gigabyte GA-P35-DS4 rev. 2.1
    Memory
    4GB DDR2
    Graphics Card(s)
    512mb nVidia 8800GT
Insert your vista dvd or a windows 7 dvd and boot and repair the boot up. The menu will then show both items as recovered and you should then be able to dual boot. easybcd is hit and miss on working.

or

Dual-boot Repair tool - Windows 8, Windows 7, Vista
 

My Computer

System One

  • OS
    All Versions Of Windows
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home Built
    CPU
    Intel I5-2500K
    Motherboard
    ASUS Maximus IV GENV
    Memory
    DD3 1600 Crucial 8G 2x4
    Graphics Card(s)
    NVidia ONY XLR8 gtx460oc
    Sound Card
    onboard xFI
    Monitor(s) Displays
    Samsung 24" LCD
    Screen Resolution
    1920x1080
    Hard Drives
    2x160 SATA 2 WD
    1x250 Samsung SATA 2
    PSU
    Cooler Master 650w
    Case
    Antec 300
    Cooling
    Cooler Master 212 Pus
    Keyboard
    iRocks Gaming Keyboard
    Mouse
    Logitech G400
    Internet Speed
    25Mb Down 2Mbit Up
Do you know how to use the bootrec.exe command?

It will probably take a bootrec /rebuildBCD to find all the OSes. And you will probably need to boot to the install media and select Repair, then go to the command window.

Or, and some folks prefer this, use the boot device menu to select either the drive with Windows 8, or the one with Windows 7. They should both be bootable.
 

My Computer

System One

  • OS
    Windows 8.1 x64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home Grown
    CPU
    i7 3770K
    Motherboard
    ASUS P8Z77 -v Pro, Z87-Expert
    Memory
    16 G
    Graphics Card(s)
    EVGA GTX 680 Classified (2)
    Hard Drives
    Kingston SSD 240 GB
Thanks for all your help guys. Added an entry into the suggested Easybcd program and that worked a treat.

Thank you. :) I was panicking a bit.
 

My Computer

System One

  • OS
    Vista & Win 8
    CPU
    Intel Q9450 2.67GHz quad
    Motherboard
    Gigabyte GA-P35-DS4 rev. 2.1
    Memory
    4GB DDR2
    Graphics Card(s)
    512mb nVidia 8800GT
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