File erasing before you sell laptop

[Ximen]

hi
i wanted to sell my laptop but i am having lots of personal data on it and i want to to delete it all by any way so that no one can unable to retrieve it so does any one knows such proper way to wipe out harddisk so i can clean up safely and sell laptop without any problem ?
thank you

[Xan]

If you have windows bootable disk you can erasing hard disk by using formatting option so just boot with disk and format your hard disk to another format of partition than you currently have like if you have fat then go for ntfs also use complet format not quick format.

[Sam.D]

Use disk wipe utility try utility that can boot from an external device such as cd, usb so that can work better.like try Free Disk Wipe. Free Disk Wipe data cleanup and file wipe tool, that allow you to completely wipe/remove/ delete/erase a selected files,on a disk

[timon]

Try Active KillDisk Detects and displays information about all partitions, hard disks and floppy drives currently connected to your computer .safe to use data is not possible to recover for more check here How to Completely Erase a Hard Disk and How to Wipe my Harddrive