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Possible Duplicate:
How to remove Ubuntu and put Windows back on?

Yesterday I tried to install Ubuntu.

I burned Ubuntu 10.04 Desktop on a CD, and it was really slow when I tried to boot from the CD.

So, I tried to install it from a USB-flash. I used Universal USB Installer and set it to my E:/ hard disk. Now, I can't load any system. Windows can't load I don't know why and Ubuntu can't to be installed. Because when I tried to install it to the hard drive, this message appears: 

No root file system is defined

Please correct this from the partitioning menu..

What I must to do to recover Windows?

Community
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den
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2 Answers2

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Booting Ubuntu from a live cd will indeed lag because you are running a whole operating system from a slow cd... Usb flash drive is indeed a little quicker but booting from cd should gain you access to your hard-drive and let you backup any files that are important...

TenPlus1
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In order to have windows 7 back just run the windows 7 CD in repair mode.

follow this in order to have the console : http://pcsupport.about.com/od/toolsofthetrade/ss/windows-7-startup-repair.htm

Under the console you'll type :

fixboot

and

fixmbr

Those two commands will restore normaly the whole windows 7 boot process. if not follow the procedure of the link I gave you.

So now you are in single boot with windows 7.
For windows xp same procedure and go to the recovery mode then type fixmbr This should make your windows back to life.
If you have a mess with your partitions you can use the Gparted live cd to correct your partitions.
To download Gparted live cd clicl here.
If you dont want to use Gparted you ca use a sofwtare caleed Partition table doctor for Windows