Windows 10: KB4078130 Update to Disable Mitigation against Spectre, Variant 2

Discus and support KB4078130 Update to Disable Mitigation against Spectre, Variant 2 in Windows 10 News to solve the problem; @RingTailCoon the information I had previously posted was from a discussion on another forum. I did several tests on this issue today. When MS... Discussion in 'Windows 10 News' started by Brink, Jan 28, 2018.

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  1. POLO6RGTI
    Polo6RGTI Win User

    KB4078130 Update to Disable Mitigation against Spectre, Variant 2


    @RingTailCoon the information I had previously posted was from a discussion on another forum.

    I did several tests on this issue today.

    When MS released the Spectre Variant 2 critical update I already had set FeatureSettingsOverride to 0 and FeatureSettingsOverrideMask to 3. When I ran the critical update on my computer it only changed the FeatureSettingsOverride to 1 leaving the FeatureSettingsOverrideMask still at 3.


    Here are my personal findings for when running the Spectre Variant 2 critical update with various value combinations of the FeatureSettingsOverride and FeatureSettingsOverrideMask :

    1. If the registry entries does not exist the update will create the FeatureSettingsOverride and FeatureSettingsOverrideMask entries and set both to 1.
    2. If FeatureSettingsOverride was set at 0 and FeatureSettingsOverrideMask at 0 the update will change both to 1.
    3. If FeatureSettingsOverride was set at 1 and FeatureSettingsOverrideMask at 1 the update will make no changes to these two entries.
    4. If FeatureSettingsOverride was set at 0 and FeatureSettingsOverrideMask at 3 the update will change only the FeatureSettingsOverride to 1 while still leaving FeatureSettingsOverrideMask at 3.
    5. If FeatureSettingsOverride was set at 1 and FeatureSettingsOverrideMask at 2 the update will change only the FeatureSettingsOverrideMask to 3 while leaving FeatureSettingsOverride set at 1.
    6. If FeatureSettingsOverride was set at 1 and FeatureSettingsOverrideMask at 3 the update will make no changes to these two entries.
    7. If FeatureSettingsOverride was set at 2 and FeatureSettingsOverrideMask at 2 the update will change both to 3.
    8. If FeatureSettingsOverride was set at 3 and FeatureSettingsOverrideMask at 3 the update will make no changes to these two entries.

    "FeatureSettingsOverrideMask" defines the bit range for "FeatureSettingsOverride"
     
    Polo6RGTI, Jan 30, 2018
    #31
  2. JOHNGALT
    johngalt Win User

    You should be able to change the registry values with no ill effects, however, it's possible that the system restore didn't note the change in the registry entries when you ran the KB4078130 update for whatever reason - did you make a restore point before running the update?

    I'd also check for what updates you have installed to see if it is still showing as installed (from appwiz.cpl, click Show Installed Updates at the left)
     
    johngalt, Jan 31, 2018
    #32
  3. KHANMEIN
    khanmein Win User
    Mine is showing;

    FeatureSettingsOverride 1
    FeatureSettingsOverrideMask 1

    What does it mean? Thanks.
     
    khanmein, Feb 21, 2018
    #33
  4. GENEO
    Geneo Win User

    KB4078130 Update to Disable Mitigation against Spectre, Variant 2

    It means you are overriding Spectra variant 2 patch (the one requiring a microcode update as well as windows patch). The microcode has been problematic.
     
    Geneo, Feb 21, 2018
    #34
  5. RINGTAILCOON
    RingTailCoon Win User
    Haven't received any for my GIGABYTE GA-H110M-S2H... *Sad
     
    RingTailCoon, Feb 21, 2018
    #35
  6. STORAGEMAN
    storageman Win User
    Do you have F25a installed ?
     
    storageman, Feb 22, 2018
    #36
  7. RINGTAILCOON
    RingTailCoon Win User
    RingTailCoon, Feb 22, 2018
    #37
  8. RINGTAILCOON
    RingTailCoon Win User

    KB4078130 Update to Disable Mitigation against Spectre, Variant 2

    Whe-hey! Finally I got the CPU update! (F25c) (Update CPU-Microcode) only Inspectre keeps on blabbering that Spectre prot. is still disabled and I can't get it enabled (keeps turning off...)

    So HOW dó I turn it back on?

    edit oops never mind, had to restart haha! *092
     
    RingTailCoon, Mar 14, 2018
    #38
  9. RINGTAILCOON
    RingTailCoon Win User
    Yes
     
    RingTailCoon, Apr 4, 2018
    #39
  10. CALEDON KEN
    Caledon Ken Win User
    So to enable both I assume you, @RingTailCoon set FeatureSettingOverride and FeatureSettingOverrideMask to 0 (zero), correct?
     
    Caledon Ken, Apr 11, 2018
    #40
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KB4078130 Update to Disable Mitigation against Spectre, Variant 2

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