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Well, its about .NET framework 3.5 and 4, WOU only have option to download full version 4 but not .net framework 4 Client Profile - its much smaller and all i need to run .net framework 4 programs, full version is for programming. I preffer the CP and there is no option to either download only 3.5 and manually 4 CP later, or both via WOU. And one more think - do i really need .net 3.5 ? I ask because i dont know if i only install .net 4 CP and no 3.5 some programs can not work ? locically in most programs there is description ,,need .net 2.0/3.0/3.5 or NEWER to work/install" something like that. Just asking