The story goes that, whereas he was engaged on ThrottleStop, he observed a bug in Windows Defender that causes it to occupy all seven {hardware} efficiency counters on the affected machines. It is not a bug within the {hardware} itself, as a result of when you manually emulate what Defender is doing, it would not have an effect on efficiency. The concern can apparently happen on boot or any time after that, and as soon as it happens, you will see a small however vital drop in efficiency, significantly for multi-core apps.
If you’d relatively hold your real-time safety on however nonetheless need to repair the problem, nicely, that is what Counter Control is for. Simply head over to TechPowerUp and download the app. If it is displaying “Defender” underneath Current standing once you launch it, click on “Reset Counters” and efficiency must be restored to regular. If you do not need to need to mess with that each time you boot, you’ll be able to as an alternative set up ThrottleStop model 9.5 or later and tick the “Windows Defender Boost” possibility.