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windows/security/information-protection/bitlocker/ts-bitlocker-intune-issues.md
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@ -22,11 +22,11 @@ This article provides assistance for issues you may see if you use Microsoft Int
![The BitLocker status indictors on the Intune portal](./images/4509189_en_1.png)
To start narrowing down the cause of the problem, review the event logs (as described in [Troubleshoot BitLocker](troubleshoot-bitlocker.md). Concentrate on the Management and Operations logs in the **Applications and Services logs\\Microsoft\\Windows\\BitLocker-API** folder. The following sections provide more information about resolving the following events and error messages:
To start narrowing down the cause of the problem, review the event logs as described in [Troubleshoot BitLocker](troubleshoot-bitlocker.md). Concentrate on the Management and Operations logs in the **Applications and Services logs\\Microsoft\\Windows\\BitLocker-API** folder. The following sections provide more information about resolving the following events and error messages:
<a id="list"></a>
- [Event ID 853: TPM not available](#issue-1)
- [Event ID 853: Failed to enable Silent Encryption. TPM is not available](#issue-1)
- [Event ID 853: Bootable media detected](#issue-2)
- [Event ID 854: WinRE not configured](#issue-3)
- [Event ID 851: Contact manufacturer for BIOS upgrade](#issue-4)
@ -41,19 +41,22 @@ If you do not have a clear trail of events or error messages to follow, other ar
For information about how to verify that Intune policies are enforcing BitLocker correctly, see [Verifying that BitLocker is operating correctly](#verifying-that-bitlocker-is-operating-correctly).
## <a id="issue-1"></a>Event ID 853: TPM not available
## <a id="issue-1"></a>Event ID 853: Error: A compatible Trusted Platform Module (TPM) Security Device cannot be found on this computer
![](./images/4509190_en_1.png)
You see event ID 853, which indicates that the TPM cannot be found.
![Image that shows the details of Event 853 (TPM is not available)](./images/4509190_en_1.png)
### Cause
Device may not have a TPM chip or it might be disabled from BIOS
The device that you are trying to secure may not have a TPM chip, or the device BIOS might be configured to disable the TPM.
### Resolution
TPM needs to be enabled in BIOS and you can check the TPM status running tpm.msc from Run. TPM needs to be in ready state (TPM version 2.0)
## <a id="issue-2"></a>Event ID 853: Bootable media detected
## <a id="issue-2"></a>Event ID 853: BitLocker Drive Encryption detected bootable media (CD or DVD) in the computer
![](./images/4509191_en_1.png)