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Windows 11 Slowness Caused By Defender Memory Integrity Disabled

ยท 2 min read
James Yip
James Yip

Recently I had a need to use Windows device for some work. I take my Windows laptop out (a 3 years old ThinkPad X1 Yoga) and find that it work like a 10 years old laptop in terms of performance. It's unusable. After some research, I found that it could be caused by the fact the memory integrity check function in Windows Defender is not able enable. I go ahead to try do the following to enable the feature and the result is amazing.

Not able Enable Windows Defender Memory Integrity

  1. First, I try reset the Defender UI as the option to enable memory integrity protection is disabled
Set-ExecutionPolicy Unrestricted -Scope CurrentUser
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
  1. After have access to the toggle button to enable memory integrity, I try enable it but failed. It reports some drivers is not compatible with the feature. The one happened to me is csrbcx64.sys

Incompatible Drivers Incompatible Drivers List

  1. After some research, I find this command can try delete the drivers but not work as they can only take the inf files.
pnputil /delete-driver csrbcx64.sys /uninstall /force

  1. Either you can find the info from the screen or do a registry search of the driver csrbcx64 and found it's included in a driver package covered by oem47.inf Drivers Package Name

  2. Then run the following command to delete the driver

pnputil /delete-driver oem47.inf /uninstall /force

  1. Finally I can enable the memory integrity feature and then restart the device. Enable Windows Defender Memory Integrity

  2. The PC feels like normal, and performance is very responsible (well not like lightning fast as it's 3 years old machine anyway)

Hope this help you or anyone experience the slowness after upgrade the Windows 11 to some latest build.