Blurry Graphics in Windowed Mode

[Cainehill]

Yep, that's probably it - after the Windows reinstall it probably didn't set the graphics resolution to the native resolution for the laptop's LCD. Because of this, it has to "blur" things in order to approximate the physical resolution. (For instance, if running 800x600, it has to expand every 4 pixels to 5 (800 vice 1024) in one direction, and every 6 pixels into 7.68 (600 vice 768) the other.