You're right - in theory. I've tried both. Copy from partitions of the same drive as well as form external hdd. Of course with two different drives it's better, but in both cases even Vista was faster than Win7. But that is not the real problem. I could live with a sluggish copy process. But I can NOT live with a nearly freezing system as soon as i start any copying. Something is very wrong here - despite the fresh Win7 installation.