Step by step Windows 7 uninstallation

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Tags: Windows 7 uninstall

As you all know Microsoft operating system supports dual-booting, that means you can run different operating systems on a single computer and choose one to boot at startup.

If you have installed Windows 7 on top of current Windows, for example.  But, now want to remove Windows 7 follow the instructions below to uninstall Windows 7 to leave only Windows XP without having to reinstall the OS, and without affecting personal files and data.

Important: Use these steps at your own risk. We don’t recommend this method if your dual boot system is Windows 7 and Windows Vista.

1.Start up and log on to Windows XP system.

2.Insert the Windows 7 installation disc into CD-ROM or DVD-ROM optical drive.

3.Run Command Prompt, or click directly to Start menu -> Run command.

4.In the command prompt or the Run text box, type the following command and hit Enter:
[DVD Drive Letter]:\boot\bootsect.exe /nt52 ALL /force
For instance, if the DVD drive path is D:, then enter the following: D:\boot\bootsect.exe /nt52 ALL /force. This step will remove the boot menu to select operating system to start.

5. Eject the DVD disc and reboot the system.

6. The computer will boot up with Windows XP installation partition.

7. Next, you can  manually remove files and folders of Windows 7, including Windows, Program Files and Users folder. If you’re installing to separate partition, just format the partition to clean it instantly (with FDisk, Disk Manager of Computer Management or third party partition management software such as Partition Magic or EASEUS Partition Manager).

8. On the root system folder of Windows XP, delete Boot.BAK and BootSect.BAK. The two files are remnant backup leftover files of previously installed Windows 7 bootloader, but no longer useful for Windows XP only system.

Note: NT52 is the MBR (Master Boot Record) supported by Windows XP and Windows Server 2003, while Windows Vista uses NT6. So, if you want to remove Windows 7 in Vista/7 dual boot system, change the NT52 in the command to NT60.
Important: When startup repair the boot record after removing an installed operating system from dual-boot or multi-boot system, always use the highest version of Windows installation DVD/CD to perform the repair. For example, in a tri-boot PC with Windows XP, Vista and 7, after removing Windows 7, use Windows Vista to repair the system. If the PC is restored and reverted back to Windows XP, then use the Windows XP setup CD.

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