Windows
operating system supports dual-booting a PC, where users can install multiple OSes and select which system to boot up to on machine startup. If you have installed Windows 7 or Windows Vista on top of current existing Windows XP to make the PC a dual boot system, but now decided to ditch or dump the Windows 7 or Windows Vista partition to revert to the old good classic Windows XP follow the guide below to uninstall and remove Windows 7 or Windows Vista to leave only Windows XP without having to reinstall the OS, and without affecting saved files and data.

Important: Do not use this tutorial if your dualboot system is Windows 7 and Windows Vista.

   1. Boot up and log on to Windows XP desktop.
   2. Insert the Windows Vista or Windows 7 DVD installation disc into CD-ROM or DVD-ROM optical drive.

      Alternatively, mount the Windows 7 or Windows Vista DVD ISO image on any virtual drive.
   3. Run Command Prompt, or click directly to Start menu -> Run command.
   4. In the command prompt or the Run text box, issue the following command and hit Enter:

      [DVD Drive Letter]:\boot\bootsect.exe /nt52 ALL /force

      For example,

      If the DVD drive path is D:, then enter the following:

      D:\boot\bootsect.exe /nt52 ALL /force

      The step will remove the boot menu to select operating system to start.
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