I use windows 7 RC by double-booting with XP, whilst Windows 7 is installed on .VHD and booted with windows 7 boot manager. I recently installed Primiere CS4 and it works well on XP but on Windows 7 it laggs. I have 2gigs of ram which is the minimum requirement for both Windows 7 and Primiere. I was wondering if the lag in Windows 7 is because of Windows 7 itself or because of the nature of boot from .VHD. I want to know that because I plan to get rid of XP and install a normal Windows 7 installation without .VHD when it releases, and I want to be sure that Primiere will work for me. So, anyone has a clue? (bear in mind that I watch videos and run games normaly in the current Windows 7, it's only primiere that has been doing problems) Thanks in advance, Noam.