If you install Windows 7 in dual boot and want to remove the old operating system on your personal computer because you want to recover precious space, then you absolutely must read this guide that teaches step by step how to remove the dual boot. First, restart your PC from the DVD to install Windows 7.
In the screen that appears, choose the option to start the operating system and accept the license. Move in “Advanced / Disk Options”, select the hard disk format and follow the steps to complete the procedure. In case did not have to have at hand the disk to install Windows 7, you can create a Startup Disk . It starts the operating system, go to the Start menu and search box, type Create a Startup Disk system, pressing Enter to confirm. Insert a blank DVD disk and choose Create AutoPlay screen appears on the screen. When finished, restart your PC making sure to boot from the Startup Disk.
Choose to load the command prompt in the options you are offered and then type in format X:, where X is the drive letter where you installed Windows XP. After formatting, however, may have some problems to log on to Windows 7. If so, restart the system from the OS installation DVD or even from the startup disk you created earlier and choose the Repair Startup item in the screen that appears. Or from the command prompt, type bootsect.exe / NT60 Y followed by Enter (where Y indicates the hard disk with Windows 7). A few seconds and you will have finally made a clean sweep of Windows XP.