I'm using a late 2009 MacBook white unibody and just need to use windows 7 for basic stuff like e-mail, spread sheets, connecting to the work server, pdf's (basic office stuff for construction project management) no 3D stuff or auto cad. I upgraded my RAM from 2 to 4gb and my OS X is faster but windows 7 still lags. When I say lags I mean I click to open a program and five minutes later i see it start opening. Do I need to reinstall windows7 and parallels to get them to recognize the increased RAM? What do I need to do?