The computer won't boot into Windows. Ahh!! We all know this scenario. When you need it the most, something fails. Maybe he hates you, maybe he is playing a prank on you. So? What is the solution? Breaking the keyboard? Well, no!
The solution is simple! You pop your Live CD into your CD drive. What is a Live CD? It's a whole operating system that can run from your CD, without installation!
With the Live CD you can boot your PC no matter what.
When everything loads, you will have access to some tools to recover your lost data, internet browsers, image manipulating software and so on. Like I said before, an entire operating system on a CD!
If you want to know more of the benefits of a Live CD, I recommend you read this free e-book called 50 Cool Uses For Live CDs.