Hi you will need an operating computer and a USB stick of at least 4Gb

Download the following two programmes to your desktop :

  1. Rufus

For 32bit systems
2. Windows Vista RC

For 64bit systems
2. Windows Vista RC

Insert the USB stick Then run Rufus

https://dl.dropbox.com/u/73555776/rufus.JPG

Select the ISO file on the desktop via the ISO icon.

Press Start Burn

https://dl.dropbox.com/u/73555776/RufusISO.JPG

Insert the USB into the sick computer and start the computer. First ensuring that the system is set to boot from USB
Note: If you are not sure how to do that follow the instructions Here

When you reboot you will see this.
Click repair my computer

https://dl.dropboxusercontent.com/u/73555776/W7%20repair.png

Select your operating system

Select System Restore

https://dl.dropboxusercontent.com/u/73555776/W7%20Command.png

Restore your computer to a few days ago