iMac, late 2006 Generation XP info: System: Microsoft Windows XP Professional Version 2002 Service pack 3 Computer: Intel(R) Core(TM)2 CPU T7400 @ 2.16GHz 2.16GHz, 2.98 GB of RAM Physical Address Extension Leopard info: Version 10.5.8, same hardware. I've installed XP via Boot Camp. The internal drive in the mac is 230gb (total), and I allocated 60gb to XP. I formatted the partition to NTFS (not quick), and completed the rest of the setup. I then inserted the Leopard DVD and installed the boot camp drivers. Then I downloaded all available updates for XP, and the only other thing I've installed is Mozilla Firefox. I've also made changes to the system using an optimization guide (link below), and the performance seems to be the same before and after. http://www.tim-carter.com/music-production/optimize-your-pc-for-music-production.php - I've only done as far as number 20. The performance is very sluggish. It shows most while scrolling. It's not smooth and jitters a lot. On previous installations of XP on this computer, I've run audio software (Pro Tools/Cubase) and the performance is terrible. It can't handle even the simplest of tasks. On the Mac OSX side of the machine, however, performance is fine. Everything runs smoothly. As far as I know, the specs of the computer are pretty good. I can't understand why performance wouldn't be up to scratch So, I'm just wondering if anybody has any ideas on what's going on? Is this normal, or am I missing something? It seems like Windows isn't using the full power of the hardware. If you need any further info, I'll post it. Thanks for your time.