How to disable Downfall pHow to disable Downfall patch and Meltdown/Spectre patch together?atch and Meltdown/Spectre patch together?

林沐雨 10 Reputation points

As you know, MS just release a method to disable Downfall patch


Registry location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
Value name: FeatureSettingsOverride
Value type: REG_DWORD
Value data: 0x2000000 (hex)

and I set this  value to 3 to disable Meltdown/Spectre patch 

To disable mitigations for CVE-2017-5715 (Spectre Variant 2) and CVE-2017-5754 (Meltdown)

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverride /t REG_DWORD /d 3 /f

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverrideMask /t REG_DWORD /d 3 /f

Note: Setting FeatureSettingsOverrideMask to 3 is accurate for both the "enable" and "disable" settings.

how I can disable them together? thank you

Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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  1. Ian Xue (Shanghai Wicresoft Co., Ltd.) 34,191 Reputation points Microsoft Vendor


    It seems like a bit-flag value. Please see if set the data of the registry value FeatureSettingsOverride to 0x2000003 can disable both patches.

    Best Regards,

    Ian Xue

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