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Merge pull request #3296 from Teresa-Motiv/v-tea-CI-120967

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windows/security/identity-protection/credential-guard/credential-guard-manage.md
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@ -8,11 +8,14 @@ ms.pagetype: security
ms.localizationpriority: medium
audience: ITPro
author: dulcemontemayor
ms.author: dansimp
ms.author: v-tea
manager: dansimp
ms.collection: M365-identity-device-management
ms.topic: article
ms.reviewer:
ms.custom:
- CI 120967
- CSSTroubleshooting
---
# Manage Windows Defender Credential Guard
@ -154,14 +157,25 @@ DG_Readiness_Tool_v3.6.ps1 -Ready
- You should perform regular reviews of the PCs that have Windows Defender Credential Guard enabled. This can be done with security audit policies or WMI queries. Here's a list of WinInit event IDs to look for:
- **Event ID 13** Windows Defender Credential Guard (LsaIso.exe) was started and will protect LSA credentials.
- **Event ID 14** Windows Defender Credential Guard (LsaIso.exe) configuration: 0x1, 0
- The first variable: 0x1 means Windows Defender Credential Guard is configured to run. 0x0 means it's not configured to run.
- The second variable: 0 means it's configured to run in protect mode. 1 means it's configured to run in test mode. This variable should always be 0.
- **Event ID 14** Windows Defender Credential Guard (LsaIso.exe) configuration: \[**0x0** \| **0x1** \| **0x2**\], **0**
- The first variable: **0x1** or **0x2** means that Windows Defender Credential Guard is configured to run. **0x0** means that it's not configured to run.
- The second variable: **0** means that it's configured to run in protect mode. **1** means that it's configured to run in test mode. This variable should always be **0**.
- **Event ID 15** Windows Defender Credential Guard (LsaIso.exe) is configured but the secure kernel is not running; continuing without Windows Defender Credential Guard.
- **Event ID 16** Windows Defender Credential Guard (LsaIso.exe) failed to launch: \[error code\]
- **Event ID 17** Error reading Windows Defender Credential Guard (LsaIso.exe) UEFI configuration: \[error code\]
- **Event ID 17** Error reading Windows Defender Credential Guard (LsaIso.exe) UEFI configuration: \[error code\]
You can also verify that TPM is being used for key protection by checking Event ID 51 in the **Microsoft** -> **Windows** -> **Kernel-Boot** event source. If you are running with a TPM, the TPM PCR mask value will be something other than 0.
- **Event ID 51** VSM Master Encryption Key Provisioning. Using cached copy status: 0x0. Unsealing cached copy status: 0x1. New key generation status: 0x1. Sealing status: 0x1. TPM PCR mask: 0x0.
- **Event ID 51** VSM Master Encryption Key Provisioning. Using cached copy status: **0x0**. Unsealing cached copy status: 0x1. New key generation status: 0x1. Sealing status: **0x1**. TPM PCR mask: **0x0**.
- You can use Windows Powershell to determine whether credential guard is running on a client computer. On the computer in question, open an elevated Powershell window and run the following command:
```powershell
(Get-CimInstance -ClassName Win32_DeviceGuard -Namespace root\Microsoft\Windows\DeviceGuard).SecurityServicesRunning
```
This command generates the following output:
- **0**: Windows Defender Credential Guard is disabled (not running)
- **1**: Windows Defender Credential Guard is enabled (running)
> [!NOTE]
> Checking the task list or Task Manager to see if LSAISO.exe is running is not a recommended method for determining whether Windows Defender Credential Guard is running.
## Disable Windows Defender Credential Guard
@ -221,7 +235,7 @@ You can also disable Windows Defender Credential Guard by using the [HVCI and Wi
```
DG_Readiness_Tool_v3.6.ps1 -Disable -AutoReboot
```
> [!IMPORTANT]
> [!IMPORTANT]
> When running the HVCI and Windows Defender Credential Guard hardware readiness tool on a non-English operating system, within the script, change `*$OSArch = $(gwmi win32_operatingsystem).OSArchitecture` to be `$OSArch = $((gwmi win32_operatingsystem).OSArchitecture).tolower()` instead, in order for the tool to work.
> This is a known issue.