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windows/security/information-protection/bitlocker/bitlocker-overview-and-requirements-faq.yml
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### YamlMime:FAQ
metadata:
title: BitLocker overview and requirements FAQ (Windows 10)
description: This topic for the IT professional answers frequently asked questions concerning the requirements to use BitLocker.
description: This article for IT professionals answers frequently asked questions concerning the requirements to use BitLocker.
ms.assetid: c40f87ac-17d3-47b2-afc6-6c641f72ecee
ms.reviewer:
ms.prod: w10
@ -15,7 +15,7 @@ metadata:
audience: ITPro
ms.collection: M365-security-compliance
ms.topic: conceptual
ms.date: 02/28/2019
ms.date: 07/27/2021
ms.custom: bitlocker
title: BitLocker Overview and Requirements FAQ
@ -60,7 +60,7 @@ sections:
> Installed Operating System on hardware in legacy mode will stop the OS from booting when the BIOS mode is changed to UEFI. Use the tool [MBR2GPT](/windows/deployment/mbr-to-gpt) before changing the BIOS mode which will prepare the OS and the disk to support UEFI.
- question: How can I tell if a TPM is on my computer?
answer: Beginning with Windows 10, version 1803, you can check TPM status in **Windows Defender Security Center** > **Device Security** > **Security processor details**. In previous versions of Windows, open the TPM MMC console (tpm.msc) and look under the **Status** heading.
answer: Beginning with Windows 10, version 1803, you can check TPM status in **Windows Defender Security Center** > **Device Security** > **Security processor details**. In previous versions of Windows, open the TPM MMC console (tpm.msc) and look under the **Status** heading. You can also run [**Get-TPM**](/powershell/module/trustedplatformmodule/get-tpm?view=windowsserver2019-ps)** in PowerShell to get more details about the TPM on the current computer.
- question: Can I use BitLocker on an operating system drive without a TPM?
answer: |
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answer: To turn on, turn off, or change configurations of BitLocker on operating system and fixed data drives, membership in the local **Administrators** group is required. Standard users can turn on, turn off, or change configurations of BitLocker on removable data drives.
- question: What is the recommended boot order for computers that are going to be BitLocker-protected?
answer: You should configure the startup options of your computer to have the hard disk drive first in the boot order, before any other drives such as CD/DVD drives or USB drives. If the hard disk is not first and you typically boot from hard disk, then a boot order change may be detected or assumed when removable media is found during boot. The boot order typically affects the system measurement that is verified by BitLocker and a change in boot order will cause you to be prompted for your BitLocker recovery key. For the same reason, if you have a laptop with a docking station, ensure that the hard disk drive is first in the boot order both when docked and undocked. 
answer: You should configure the startup options of your computer to have the hard disk drive first in the boot order, before any other drives such as CD/DVD drives or USB drives. If the hard disk is not first and you typically boot from hard disk, then a boot order change may be detected or assumed when removable media is found during boot. The boot order typically affects the system measurement that is verified by BitLocker and a change in boot order will cause you to be prompted for your BitLocker recovery key. For the same reason, if you have a laptop with a docking station, ensure that the hard disk drive is first in the boot order both when docked and undocked.