I recently upgraded to parallels 5. Since doing so my machine has slowed to a complete crawl when Parallels is running. So much so that it is unusable. When I do get Windows going I run into a problem that i have never seen before. When running a game, in this case Aion, the graphics disappear when I put my cursor over the game window. It happens in every view mode in parallel. So far the up grade form 4 to 5 has been a downgrade in every way. Speed, graphics, stability. I would appreciate your help or a refund and a downgrade to 4.0. Even though everything was choppy in 4.0 I could at least see it. My Mac Book Pro is the 17 inch June 2009 model with 4GB of ram.