[Chaprnks]

DisablePagingExecutive does not disable paging as many people believe. It actually has no effect on the pagefile usage at all. This setting effects only "ntoskrnl.exe", nothing more. Because of it's importance XP will try to keep it in memory whenever possible. Only in the case of heavy memory load will it be paged out. If you have sufficient memory this will rarely occur. If memory is not adequate you will be restricting Windows options to deal with the problem.

To sum it up, it 'could' improve performance, but will result in problems.