Deny write access to fixed drives not protected by BitLocker
- Policy ID
- FDVDenyWriteAccess_Name
- Scope
- Computer Configuration
- Supported on
- At least Windows Server 2008 R2 or Windows 7
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › BitLocker Drive Encryption › Fixed Data Drives
Description
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.
Registry
ComputerHKEY_LOCAL_MACHINE
- FDVDenyWriteAccessREG_DWORD