Microsoft is annoying me

I'm working on Word 2007. I've been working on Word 2007 for ages, but all of a sudden it seems to be doing weird things. In addition to the weird things I'm accustomed to it doing, like turning my apostrophes into open-quotes and trying to persuade me to turn all my thats into whiches.

Namely, it's auto-capitalizing my i's even when they're part of a word I haven't yet finished typing. I'm just typing away at a normal speed, and my instead reads as Instead before I've actually gotten to the end of the word. I know I can just turn off that auto-correct feature, but it's the weirdness of it suddenly starting this strange behavior that's kind of freaking me out.

Secondly, it just auto-corrected a your to you're. Which was wrong. For no reason. I'd been noticing weird homonym things when I re-read my edits for a project recently, and thought that I was just typing too fast or something and making embarrassing mistakes. But now I have to be paranoid that my own word-processor is trying to get me in trouble. I think it's time to suck it up and turn the auto-correct off entirely...I'll just have to capitalize the first words of sentences all by myself. Sigh. My lazy pinkies will not be happy.