Strange Lockups / Blue Screens Missing DVD Drives

I've had my computer since Christmas of last year. It's a pretty nice rig, lots of nice stuff in it. I'll start out with the first problem I've had with it. My DVD drive: it just disappears. I'll be running fine one minute, then the next my computer will freeze for a few seconds, then it's fine, then it'll freeze again, then it's fine. Then I take a look at my list of drives, and my DVD drive isn't on the list. I can still see my two hard drives, but not my DVD drive. This wasn't a HUGE issue to me; I figured I would just have to deal with not being able to install games or watch movies on my computer.So then, after trying to troubleshoot this issue for quite some time, I decide to completely power off my PC, including turning it off with the switch in the back. After waiting a few minutes, I flip the switch, and I hear the sound of something sparking and frying. "That's odd," I think to myself, but try to turn my computer on anyway. No response. I mash the power button but it just won't turn on. Turns out my power supply was fried. "Alright," I said. "I'll just go upgrade." But my dad disagreed and simply purchased one that was roughly equivalent to the one I currently had. Oh well, it's served me fine so far.

Recently, my problems have been getting worse. We tried reinstalling Windows, thinking that might fix the DVD drive. My dad hands me this "custom" CD with Windows and SP2 installed, and since he's likely to start screaming and spitting if I don't do his bidding, I installed with this CD. I am not sure if this was a mistake or not, but I'm thinking it was.Recently my computer has been locking and freezing at random intervals, usually while I'm playing World of Warcraft, though it also has happened at least twice while I'm just playing around on the computer, browsing the internet, ETC. The other day I was playing WoW and a bluescreen popped up. Here's the technical information, or whatever it is.