Main Computer Is Messed UP

I can't believe it. Today as soon as I got on the computer, it froze. That was while somebody instant messaged me & then it just frozed on me & I tried everything to make it work. I just restarted it (force). When it was trying to start up Windows, it failed. I tried using the last settings that worked so it can start up. That failed. So I just let it start normally. That, unfortunately failed as well. Honestly, I don't know what just happened. I'm wondering if it the hard drive...Or something. Maybe it was updating & froze accidently & it wasn't a good idea to restart it so soon. Damn, I'm just mad as hell. I have so many important things in the computer. I have like millions of essays in there & music in it. This sucks. I'm out of ideas on how to fix the computer, other than to reboot or some shit like that. Guess I'll have to go find the windows CD & the HP CD. I bet my dad is going to yell at me & blame it all on me, as always. If anyone has any idea what I should do, please tell me.