How to access the files when Windows is damage

 You Need

• An optical drive (CD,DVD or Blu-Ray) drive on the computer you wish to repair.
• An burning capable optical drive on your working computer.
• The Imgburn program (free).
• A blank CD,DVD or Blu-ray, to which we will burn data.
• A Ubuntu Linux ISO that you can download at: http://www.ubuntu.com/desktop/get-ubuntu/download

First step: setting up our Bootable media

Notice the last download: A huge *.iso file. Iso files contain CD-ROM data, that can be burned or mounted. This particular file has the Ubuntu Installer and the Ubuntu Live CD. We are interested with the live CD, because it will permit us to access our files through the Linux interface without needing to install anything. and risking damaging Windows even more.
What you will want to do is to burn this data to a CD-ROM using Imgburn. Open up the program, and select the *.iso file, then burn the disk. 

Second step: booting from the live CD

Now we have our CD. Insert it in the damaged computer's drive, and restart it. When the computer will open, you will have several options in the first seconds of the boot process. These will be like "press f2 for boot menu" or "delete=setup", stuff like that. The command we are interested in is the one that will let you access the boot menu, also called startup menu.
Once you got to the boot menu, tell the computer to boot from your disk.  

Final step: Retrieve your data

The disc will boot, usually in a few minutes. Then, you will be prompted to choose from a variety of options: choose "live cd".
Note: Some distributions will not ask you to boot from the Live CD but might automatically do so, and then give you the option to install it.
Give the software time to load, and you should now be able to navigate your files as if you had Linux installed. So plug in a removable drive, and start extracting your information!

Source : .informatics-tech