How to Uninstall the Windows Operating System

1. Shut down the computer completely. Turn it back on, repeatedly pressing the 'F8' key at the top of the keyboard while the computer boots up.
2. Select 'Safe Mode' when the Startup or Advanced Options menu appears. The computer will start in Safe Mode, which runs Windows using the minimum amount of resources.
3. Log into an administrative user account, if there are multiple users on the computer. If you receive a prompt asking whether you want to continue in Safe Mode, click 'Yes.'
4. Click 'Start' and then go to the 'Control Panel.' Double click 'Add/Remove Programs.' If using Windows Vista, click 'Start' and then type in 'Programs.' Select 'Programs and Features' from the Start menu.
5. Select the version of Windows you want to remove and click 'Uninstall.' Click 'Yes' to start the uninstallation process. When Windows has been successfully uninstalled, the computer will restart in normal mode, using the most recent version of Windows remaining on the system