We have two MX6446 Gateway laptops. I messed around and never sent the receipts in to get the free Vista upgrade, truthfully I forgot to much going on. I had forgot about ordering free Vista upgrade. Well went to mailbox sat. and 2 vista upgrades was in there, installed on one laptop and runs better than XP. We upgraded the ram to 2 gigs. on both with GeeDom memory off e-bay 38.00 a gig a couple of months ago and runs great.