Policy

Deny write access to fixed drives not protected by BitLocker

Microsoft Windows

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Deny write access to fixed drives not protected by BitLocker
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Policy overview

Key metadata and intent for this policy.

Computer
Category
Windows Components > BitLocker Drive Encryption > Fixed Data Drives
Supported on
At least Windows Server 2008 R2 or Windows 7

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016

This policy setting determines whether BitLocker protection is required for fixed data drives to be writable on a computer. If you enable this policy setting, all fixed data drives that are not BitLocker-protected will be mounted as read-only. If the drive is protected by BitLocker, it will be mounted with read and write access. If you disable or do not configure this policy setting, all fixed data drives on the computer will be mounted with read and write access.

Internal name
FDVDenyWriteAccess_Name
Policy ID
0d8581747ba1
Elements
0

Registry values

How enabled and disabled states update the registry.

ScopeRegistry locationTypeEnabled valueDisabled valueCopy
Computer
Path
System\CurrentControlSet\Policies\Microsoft\FVE
Value name
FDVDenyWriteAccess
REG_DWORD
HKLM
1
HKLM
0
Registry location
Type REG_DWORD · Computer
Path
System\CurrentControlSet\Policies\Microsoft\FVE
Value name
FDVDenyWriteAccess
Hive
HKLM
Enabled value
1
Disabled value
0

Policy elements

Inputs and configuration options exposed by this policy.

This policy has no additional user input fields.