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I have a quite strange problem. I had a system with Vista and Ubuntu installed. We always use Vista and Ubuntu was something we really did not need. BUT: to boot, GRUB was used (I guess grub2). Now, while being in Vista I cancelled the Ubuntu partition and with it also GRUB. Now the system does not boot anymore.

I tried to reinstall Ubuntu, but I had some problems with the CD.

At the moment, when the system boots I get into the GRUB shell. From there, I am able to boot Windows Vista with some commands like this ones:

grub>
title windows
rootnoverify (hd0,msdos3)
chainloader +1
boot

Now the question is: if I am able to boot in Windows Vista with this trick, is it possible to fix the MBR from inside the installed windows Vista with some command/tool of Vista itself?

I shall probably mention that we are not interested in double boot at the moment. We only want Vista to start.

I can sum up the question like this: is there a way to fix the MBR from the installed version on Windows Vista, considering that GRUB is at the moment installed?

I hope I was clear enough.

Thanks for your help.

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migrated from serverfault.com Feb 22 '11 at 22:24

This question came from our site for professional system and network administrators.

    
Superuser here we go! –  Dan Feb 22 '11 at 21:57
    
Sorry, may I ask you to be more precise? I do not have much experience of Windows Vista :) –  Danilo Feb 22 '11 at 22:01
    
@Danilo He is saying that this question is more appropriate for superuser.com which is targeted for PC issues. Serverfault is meant for professional IT Q&A. No need to do anything, this question will get migrated. –  squillman Feb 22 '11 at 22:16

1 Answer 1

up vote 0 down vote accepted

Boot from the Vista installation disc and choose Repair. Select Command Prompt from the recovery options and use bootrec /fixmbr.

Complete instructions here.

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Thanks for your answer! BUT: I do not have any installation disk. This is why I am asking about "installed windows Vista". –  Danilo Feb 22 '11 at 22:00
    
It's impossible to fix the MBR without the disk, or if you can, create a bootable USB with Vista installation on it and then work from there. If you are not able to access a disk then what you want to do is impossible. –  paradd0x Feb 22 '11 at 23:02

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