New computers that come preinstalled with Windows 7 often have what is called a recovery partition. This is used to reinstall the operating system in the event of a system crash. To access it, you will need to boot into when you start your computer by pressing
a function key. This can be either F1, F2, F9, F10, F11, F12 or even DEL or Tab key. Consult the owners manual that came with your PC for instructions about how to reinstall Windows.
If your recovery partition is not available or damaged, you should contact the manufacturer of your computer and request a recovery disc set you can use to reinstall Windows 7. They might charge a small shipping and handling fee.
This is how the recovery partition is accessed for the most popular makes
For Dell, press CTRL + F11 directly after powering up the unit
For HP, press F11 directly after powering up the unit
For Toshiba, press and hold '0' BEFORE and during the power up
For Acer, press and hold ALT + F10 as soon as you see the logo
For Asus, press F9 as soon as you see the Asus logo.
For Advent, restart your computer. Then Press F10 repeatedly until the message "Starting System Recovery" is displayed
Download the corresponding edition of Windows 7 you have a license for from the following link. You can identify the edition on COA sticker attached to your machine, with at bottom or battery compartment (laptop) or top/side if its a desktop computer.
ImgBurn - In addtion to supporting the creation of CD's from .ISO files,
it supports a wide range of other image file formats, and it's free.
(BIN, CUE, DI, DVD, GI, IMG, MDS, NRG, PDI and ISO) http://www.imgburn.com/