I'm officially pissed at Windows + Need help

[evilbutterfly]

K, so you guys know how sometimes Windows will pop up a little thing in the bottom right saying there are new updates available for download? And you know how if you don't get them yourself the computer will download them by itself? And you know how after it's done it'll install them and prompt you to restart all on its own? And ya know how if you don't restart it yourself it will do it for you?

Well you see, I use my computer as an alarm clock, with the volume turned up it blares music in the morning to get me up. Well my computer decided to restart itself last night, so my alarm didn't go off, so I overslept and missed my freaking physics test. I have no idea what I'm going to do about that, but to make sure it doesn't happen again, I need your help.

HOW THE HELL DO I MAKE MY COMPUTER STOP UPDATING ITSELF!? I swear I told it not to update itself a long time ago but it won't stop. Does anybody know exactly what I have to do to make it completely stop getting updates and installing them itself? It's really freaking annoying, especially when it pops up that dialog saying it will restart in 30 seconds unless I say no. Computers shouldn't freaking do that, and it's really pissing me off.