Jeronimo, indeed, performance counters can be disabled, or at least removed, it's just a reg entry in the services I think. I delete those performance folders in all of my services and then the performance counter configurator doesn't display any of them. About the Event Log...that one might get tricky as XP needed some hacking to allow the removal and I would like to postpone hacking Vista (if even possible on 64bit version) until it's the only big thing left. But then again maybe it removes just fine, we'll see in one of the next versions. Just to repeat what I said...that latency checker doesn't change the values whatever I run...then what is it actually measuring is the question, maybe it doesn't have anything to do with the processes in the background, maybe it all depends on the CPU driver used and ACPI pooling.