I read the store specifications that said it is directx 9.0 but when i saw the required operationg system it never says anything about windows 7 and i am wondering if it works with windows 7 and the AERO effect before buying

Product Description
Two years after Commander Shepard repelled invading Reapers bent on the destruction of organic life, a mysterious new enemy has emerged. On the fringes of known space, something is silently abducting entire human colonies. Now Shepard must work with Cerberus, a ruthless organization devoted to human survival at any cost, to stop the most terrifying threat mankind has ever faced. To even attempt this perilous mission, Shepard must assemble the galaxy’s most elite… More >>

Mass Effect 2 Collector’s Edition