Event ID 19 WHEA-Logger - Hardware Error - BSOD - Meltdown Spectre

  1.    21 Jan 2018 #1

    Event ID 19 WHEA-Logger - Hardware Error - BSOD - Meltdown Spectre

    Dell Precision T1700 Workstations. 10 of them. Thousands of Event ID 19 - WHEA-Logger - A corrected hardware error has occurred. Random blue screens. They all have the new Dell Bios with the Meltdown and Spectre Mitigations microcode AND the Microsoft Mitigation Patches.

    Cause: Microsoft Meltdown and Spectre Mitigations

    Here is the Workaround -
    First make a Windows System Restore Point.

    Run this script (as administrator) to disable the Meltdown and Spectre Mitigations by Microsoft - reboot required. Save as a .bat file:

    Example of a batch file - DisableMitigation.bat

    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

    First Determinate if you are at risk if you disable the mitigations. Opinion: The risk is very low for the vast majority of users.

    Also determine if you only need to disable only one of the two mitigations:

    0 = Both CVE-2017-5715 and CVE-2017-5754 enabled (WHEA Errors)
    1 = CVE-2017-5754 Enabled Only (No WHEA Errors)
    2 = CVE-2017-5715 Enabled Only (WHEA Errors)
    3 = Both Disabled (No WHEA Errors)

    Note: I have not yet tested downgrading the bios and leaving the Microsoft mitigation enabled.

    To Turn it Back On, see: https://support.microsoft.com/en-us/...tive-execution

    Also Read Carefully: https://support.microsoft.com/en-us/...virus-software

    Intel says new firmware patches trigger reboots in Haswell and Broadwell systems:

    Issue: Thousands of Event ID 19 - random blue screens.
    Event ID 19 WHEA-Logger
    A corrected hardware error has occurred.
    Reported by component: Processor Core
    Error Source: Corrected Machine Check
    Error Type: Internal parity error
    Processor APIC ID: 0
      My ComputerSystem Spec

  2.    30 Jan 2018 #2

    Microsoft now admits the bug and is offering an optional update to disable one of the mitigations:
      My ComputerSystem Spec


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