How to format laptop windows 7 using pendrive


if your going to put windows 7 or 8 back on the laptop then use microsoft iso to usb tool. it take the windows 7 or 8 iso image and make a bootable usb stick for you. when you boot from the usb stick go into advance mode and format or fdisk the drive.
the other easy way is use a boot usb tools disk (hirem boot disk).
http://www.hiren.info/pages/bootcd