Click the Windows 'Start' button and select KillDisk from the 'All Programs' list. Download and install the freeware program KillDisk (see Below). Disc-cleaning programs work by repeatedly overwriting the contents of a hard drive with random data patterns, making it virtually impossible to recover the original files.

Instead of simply formatting your hard drive, use disc-cleaning software to permanently erase its contents. Using data-recovery software, someone still could retrieve sensitive data and files from your hard drive even after you've formatted it. The next will be because the operating system is loaded and will boot from your cdįormatting a hard drive to erase its contents does not mean the files are necessarily gone forever.

Your computer will automatically restart it might restart 2 times one to finish the installation Note after you have loaded the operating system you should go back and change the first boot device to failsafe or optimised defaults after windows has loaded Note this will erase you operating system you will have to have an operating system disk to load it onto you hard drive or create a partition to load another operating system Press and hold that key during the boot up process to enter BIOS then using the arrow keys scroll down to advanced bios features press enter change your first boot device to cd press escape then press f10 to save to cmos to restart Restart your computer during the boot process you will see on the screen to press a certain key to enter setup usually the Delete or F2 key

You have to install another operating system

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