What do I do?

I got Fallout 3 for the PC today, and my life got screwed up again. I tried to install the game on my computer, the damn thing doesn't work on windows 7. I try to go in and fix it so that it does. And every time I use that program (Notepad++), it says something about "check if file is open in another program" WTF is that!? Every time I try to use that program it says that!!! Then, I try to save it again and accidentally deleted the game's engine off my computer!!! This dumb ass computer! Every time I try to save something on that program, it never works! I tried to save it again and it says I need administrator permission! I'm on the administrator thing, and nothing is working!!! WTF am I supposed to do? Is my computer screwed, or is there a way to get it back? I am so pissed at this computer, you piece of ****! I tried everything and it still doesn't work! I waited so long to get this, and life comes around and takes a crap in my freaking face! Why? I'm getting tired of this crap happening to me all the damn time!!!
why can't anything ever work normally!? Instead, everything I do somehow gets ruined or destroyed.
