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Custom Classes: Deny read access

Policy ID
CustomClasses_DenyRead_Access_2
Scope
Computer Configuration
Supported on
At least Windows Vista
Source
Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category
System › Removable Storage Access

Description

This policy setting denies read access to custom removable storage classes.

If you enable this policy setting, read access is denied to these removable storage classes.

If you disable or do not configure this policy setting, read access is allowed to these removable storage classes.

Options

  • Enter GUID in format {xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx},
  • include brackets. Each custom GUID must be a separate entry
  • GUID for custom removable storage class:

Registry

ComputerHKEY_LOCAL_MACHINE
HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\Custom\Deny_ReadView registry values
  • Deny_ReadREG_DWORD
HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\Custom\Deny_Read\ListView registry values
  • (list values)REG_SZ

Other policies in the same category

View all policies in this category (19)