@EveningStar_NM @HackingDave@hacks4pancakes@PTsecurity_UK The non existent file you want to block is perfrc.dat. The kill switch is the presence of perfrc (no extension), which you want accessible.
@EveningStar_NM @HackingDave@hacks4pancakes The file should not exist in the first place. And the Group Policy path you mention above doesn't exist, at least not in Windows 10.