If you will have a Windows 10 or 11 machine with an Intel Core CPU from the Eighth-through-Eleventh generations, you undoubtedly need to learn this submit. As it occurs, Windows Defender’s real-time safety on these machines is sapping much more efficiency than regular. The bug was discovered by Kevin Glynn, often known as “Uncle Webb.” He’s the creator of well-liked utilities like RealTemp and ThrottleStop, and he is created a brand new utility referred to as Counter Control that permits you to monitor and log the efficiency counters of Intel CPUs.
Images from TechPowerUp.

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 select, you’ll be able to work round this by merely disabling Windows Defender’s real-time safety. This is a little bit of a large number as Microsoft actually would not need you doing that for apparent causes, however you’ll be able to nonetheless do it in “Pro” variations with a gaggle coverage setting. Some tweakers and hardcore gamer varieties probably have Windows Defender disabled already, and thus will not be affected by this concern.
Images from Uncle Webb himself

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.