When we talk about uninstalling Linux, we are either talking about wiping the entire drive clean (reformatting) or installing a new operating system onto the drive. These instructions will guide you through the process of wiping clean your Linux operating system
Reinstalling
If you want to uninstall your operating system to install Linux, you don't really need to worry about uninstalling. The installation process for the new operating system will take care of this during the installation process. Just follow the instructions for installing your Linux operating system.
The basic steps you will need to perform is: Decide whether you want to keep your disk partitions the same as they were before; Delete, resize, or recreate partitions as needed on your disk; Designate how your partitions should be used by the new operating system. Also, some Linux distributions will give you an option to keep files contained on your old drive. We recommend that you don't do this and just reformat the partitions to keep your filesystem clean. Of course, you should make a backup before preceding with this reinstallation.
Reformatting
To reformat your drive, you just need to boot off of a different device (other than the primary boot device you want to reformat). You will need to have the old drive connected and accessible as a secondary drive (or you can mount it into an external enclosure if you are using a laptop.)
Once this is done, you can use the tools provided by the operating system to access your old drive and reformat it. When using microsoft windows, you can use //Disk Administrator// to perform this task.