How to remove previous Windows versions from your PC
Installing multiple versions of Windows on a single PC may be useful for a number of purposes. From taking an operating system for an extended test ride to software testing or running legacy applications on a system that do not run on newer versions of Windows.
Sometimes you may make the decision to uninstall one version of Windows from your PC. While you can do that manually, by editing the boot loader so that the operating system won't be displayed anymore during start of the system and by deleting the files and folders so that it does not take up disk space either anymore, you need some expertise to do that.
You need to know how to edit the bootloader and remove the right files and folders to remove another operating system; may be easy for experienced admins but if you have never done this before, you may appreciate any help you can get.
NanWick Windows Uninstaller
NanWick Windows Uninstaller has been designed to provide users of all experience levels with an easy to use program to remove installed versions of Windows from the PC. Note that it is compatible with Windows Vista, Windows 7 and Windows 8 but not with Windows 10.
Note: We recommend that you create a system backup before you run the program as you may have no other means of restoring the initial state if the operation fails.
To get started download the program from the developer's website and run it after the download while signed in to the version of Windows that you want to keep using.
Click on the scan button to have the program scan the PC for additional versions of Windows installed on it. The program displays the drive letters that Windows is installed on and asks you to pick the one that you want to remove from the system.
The program performs a series of operations then that remove the version of the system from the PC. The program author explains what is happening on the author's site.
The program takes ownership of directories and files belonging to the selected version of Windows so that they can be deleted. It removes the entry from the boot manager in addition so that the system is no longer listed when you boot the computer.
You can use the instructions on the author's homepage instead if you prefer to run the operation manually.
Please note that the program is only able to detect and remove Windows Vista, Windows 7 or Windows 8 and not older versions of Windows such as Windows XP. Experienced users likely prefer the manual option, that is deleting the partition for instance and editing the boot menu afterwards manually as well.
If you want to remove an older version of Windows from a PC quickly and comfortably, NanWick Windows Uninstaller may be the right program for that. While you should create a system backup prior to running the program, it is something that you should do regularly anyway.
Experienced users and admins may want to remove other operating systems manually instead as it offers full control over the process.