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Windows 7: Repairing MBR after ubuntu troubles.

10 Oct 2010   #1

Windows 7 x64 Ultimate, Ubuntu 10.1. Windows XP Professional 32
Repairing MBR after ubuntu troubles.

Hey all. Here's a little history on my situation:

I have 3 harddrive;

OcZ Vertex 2 100 GB SSD
Some old Seagate 200 GB SATA 7200rpm
Western Digital 1 terabyte.

I installed windows 7 ultimate 64 bit on the Vertex 2 because I wanted to use it as my main OS hdd.
A few days later I decided to install Windows XP Professional 32 on the 1 TB drive so I can play games likes battlefield 2 properly. That all worked out fine and this morning I decided I wanted to install ubuntu to try it out. it installed fine and when I was done playing around with it I restarted my comp.. only to find that the ubuntu boot manager didn't have my windows 7 install listed and when I tried to boot into the install that was listed as windows xp professional, it went to another black screen with a blinking underscore and didn't do anything.

I immediatly broke out the windows 7 install disk to run Bootsect.exe to rewrite a functioning mbr.. and it wrote sucessfully using bootsect /nt60 ALL. But now when I restart my computer it doesn't even give me a boot manager or selection it just says hardware error or something and no matter what drive I make as boot 1 in my mobo's bios it does the same thing. What do I do now? Thanks for any help

My System SpecsSystem Spec
11 Oct 2010   #2


With separate HD's you should have booted via BIOS and not set up GRUB or Win7 multi-boot manager. This keeps the HD's independent to come and go as you please.

GRUB can corrupt Win7 in so many ways it is hard to sort out as we successfully do here for Win7 dozens of times per day.

Obviously the bootsect command you wrote scrambled the MBR It is best in Win7 to use Startup Repair which has automated all the former bootrec and bootsect commands.

So let's try to start Win7 using standard troubleshooting procedure here: Unplug all other HD's, set it first HD to boot in BIOS, then boot the DVD to mark it's partition Active with Diskpart and run Startup Repair up to 3 separate times to repair the MBR.

Once Win7 is started, plug back in XP to see if it will boot separately via BIOS or still contains a dual booted MBR. Post back a screenshot of your full Disk Mgmt drive map (without Ubuntu) using Snipping Tool in Start Menu and we'll see what is needed to repair XP.

Partition - Mark as Active
Startup Repair
My System SpecsSystem Spec
11 Oct 2010   #3

Windows 7 x64 Ultimate, Ubuntu 10.1. Windows XP Professional 32

Thanks a ton, will try setup repair with just the OCz drive in. Will post back when done.
My System SpecsSystem Spec


 Repairing MBR after ubuntu troubles.

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