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Metadata/style update BitLocker 18
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---
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title: BitLocker can't encrypt a drive known TPM issues
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title: BitLocker cannot encrypt a drive known TPM issues
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description: Provides guidance for troubleshooting known issues that may prevent BitLocker Drive Encryption from encrypting a drive that can be attributed to the TPM
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ms.reviewer: kaushika
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ms.technology: itpro-security
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@ -14,7 +14,7 @@ ms.date: 11/08/2022
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ms.custom: bitlocker
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---
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# BitLocker can't encrypt a drive: known TPM issues
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# BitLocker cannot encrypt a drive: known TPM issues
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This article describes common issues that affect the Trusted Platform Module (TPM) that might prevent BitLocker from encrypting a drive. This article also provides guidance to address these issues.
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@ -37,7 +37,7 @@ To resolve this issue, the TPM needs to be reset and cleared. The TPM can be res
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1. Open an elevated PowerShell window and run the following script:
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``` powershell
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```powershell
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$Tpm = Get-WmiObject -class Win32_Tpm -namespace "root\CIMv2\Security\MicrosoftTpm"
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$ConfirmationStatus = $Tpm.GetPhysicalPresenceConfirmationStatus(22).ConfirmationStatus
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if($ConfirmationStatus -ne 4) {$Tpm.SetPhysicalPresenceRequest(22)}
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@ -111,7 +111,7 @@ To verify this issue is occurring, use one of the following two methods:
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1. To review the TPM information for the affected computer, open an elevated Windows PowerShell window and run the following command:
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``` powershell
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```powershell
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Get-ADComputer -Filter {Name -like "ComputerName"} -Property * | Format-Table name,msTPM-TPMInformationForComputer
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```
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@ -145,7 +145,7 @@ The issue can be resolved with the following steps:
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4. Open an elevated PowerShell window, and run the following command:
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``` syntax
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```cmd
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cscript.exe <Path>\Add-TPMSelfWriteACE.vbs
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```
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