Squall, the crashes are VERY unique and they are the EXACT same. Maybe YOU'RE the one having different crashes?
The game will suddenly freeze, the screen gets all blurry/glitchy (you can still see a disc countdown timer, however, counting down in a glitchy way). Some input from the keyboard/mouse might cause a little bit of flickering in the glitchiness, but nothing too severe. Alt + F4 will not work, no keyboard shortcuts will work. The only solution is to do a rough shut down, period.
You're telling me that there are people having these crashes on Windows 7 as a result of the W7 software, and there are people having these EXACT, SAME, - UNIQUE - crashes on XP for NO related reason???
Sorry dude, but people have been having these problems, these exact crashes, way before you even registered an account here. Like I said, check out teamliquid or gosugamers if you actually want to talk to a large group of real Starcraft players. You and 2 other friends who are all beta testing W7 is probably not a good control group for your great theories.