Thank you for your answer Andrew, but I will not stand by. I'm using Parallels for my job and I cannot wait. I already downloaded Fusion and I'm doing some test. I did a migration of my Windows7 WM from Parallels to Fusion, without making any changes, and like many others have written with Fusion there are no problem of CPU usage. I suggest you to speak to your Development Team to find a solution very soon, otherwise I will switch to Fusion and I will ask for a refund.