And, it COULD be that when you take your screenshots, you're having higher resolution on the pics than in Windows. Then, in windows, in it's own photo-viewing-program it zooms out a bit so it covers the whole screen.. If you check in Photoshop (or in any other program), is it still blurry? (If not, check if it's at 100%, the viewing-thingy).
In Windows, rightclick on desktop, take properties, settings and advanced. Then you should be in your graphicscard's drivers? (Don't know if that's the exact words in english, since my Windows is in swedish..)
Then, look for a menu with 3D (maybe something more) and in there, you have anti-aliasing and anisotrop filtering (and some other settings). Pull them up to full and your LFS will look much better (if it isn't on full standard, but it shouldn't be)