I requested 2 unique T420s machines taking care of business and I opened mine final week. My T420s (4174-2AU) works amazing thus far, I'm utilizing the OEM Win 7 Pro x64 design (no unique representation from work). On the other hand the LCD screen looks totally regretful when I put my T410s following to it on the table. (My T410s is a 2912-2DU.)The screen on the T420s seems to just about have "bind stripes" on it, and the shine is no place close what the T410s can do.