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Remove Windows Vista from XP Duel boot

Vista does not have an uninstall option in add/remove programs, upgrade is permanent. You should parallel install Vista at the beginning until you get use to it. 

You will need your Windows XP disk to complete this process.

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Option 1

Removing Vista from a duel boot system is not a task for the faint hearted, so make sure you do a full back up before trying. as there is a chance of hard drive destruction.

The main reason for this problem is the new boot loader. So follow the next steps after you backup.

  • Make double sure you have backed up.
  • Now boot of your XP CD
  • Boot into recovery console by pressing "R" at the following screen.

  • Type command "FIXBOOT C:" (No speech marks)
  • Next type "FIXMBR", read serious warning messages and press "Y" to continue
  • Exit and reboot.
  • Finally edit Boot.ini and delete line with "Longhorn" or "Vista" on it and delete the folder Vista resides in. 
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Option 2

  • Boot your computer in to Windows XP.
  • Ensure you have the Vista DVD in the DVD drive.
  • Go to “Start” and “Run”. Type in “d:\boot\bootsect.exe /nt52 ALL /force” (without quotes, plus replace d: with the drive letter of your Vista DVD).
  • Restart the computer, and you will notice the boot selection menu is gone.
  • Format the partition/drive where you had Vista installed.
  • Remove two files (Boot.BAK & Bootsect.BAK) on your XP  root folder (C:)..

And now you have returned your computer to its previous state, without Vista and without the new bootloader.