In Windows 7, stopping the tracing in many if not all ETW based tools caused HDD's to spin up. Is this still the case with Win 10?
I used to like process monitor back when it didn't use ETW. Now it's a tool of last resort as it's so heavy - huge activity when you start it and then spins up the disks when you end it.
I'd find out myself* but the Start Menu in 10 previews so far is not back to 7's usability so at this point I don't see much reason to upgrade because it's not much of an upgrade if you take a hit in usability of the most used Windows feature. Another concern is the "free edition" - well lets just hope there's a "good value" edition as well, just with less legal copy and without the features intended to make the free edition somehow profitable.
* I have 10 in VM but the spin up problem does not occur in VM and you need a bunch of 3.5" hdd's to really notice it.