administrative templatesComputer ConfigurationNot configured

CD and DVD: Deny Read Access

Prevents reading from CD/DVD drives.

10 May 20264 min —

Policy path: Computer Configuration > Administrative Templates > System > Removable Storage Access
Supported on: Windows 10, Windows 11, Windows Server 2016 and later

Prevents reading from CD/DVD drives. Security baselines recommend setting it to Enabled (high-security environments).

Description

CD and DVD: Deny Read Access is a Windows Group Policy setting located under Computer Configuration > Administrative Templates > System > Removable Storage Access. It applies to the Computer Configuration branch and is classified as a Informational-level policy in the USB & Removable Storage category.

Prevents reading from CD/DVD drives.

Microsoft sets the default value to Not configured while industry security baselines (CIS, NIST, DISA STIG) recommend Enabled (high-security environments).

Under the hood, this policy is enforced through the Windows registry at HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\{53f56308-b6bf-11d0-94f2-00a0c91efb8b} using the value name Deny_Read. Modifying the value directly through regedit.exe or PowerShell produces the same effect as configuring the GPO, but going through Group Policy is preferred so that the setting is centrally managed and survives reboots, image rebuilds, and policy refresh cycles.

In-depth explanation

This is primarily an operational or user-experience setting. It does not directly raise or lower the security posture, but it standardizes behavior across the fleet, which is important for predictable support, training, and troubleshooting in an MSP-managed environment.

The policy is grouped under USB & Removable Storage, which means it is typically applied through a domain-wide GPO linked at the OU level. In a multi-tenant MSP context, scope it through WMI filters or security group filtering rather than linking at the domain root, so that you can roll out progressively (pilot OU → wider rings → all production).

The setting takes effect after the next Group Policy refresh (gpupdate /force for immediate testing, or by default within ~90 minutes for workstations and ~5 minutes on domain controllers). For computer-side policies a reboot may be required; for user-side policies, a sign-off/sign-on cycle is enough.

Use cases

Apply organization-wide hardening of usb & removable storage on all domain-joined Windows endpoints.
Roll out a CIS Benchmark-aligned baseline targeting 'CD and DVD: Deny Read Access' via a dedicated GPO.
Reduce attack surface for accounts that handle privileged credentials or sensitive data.
Standardize the configuration across multiple customer tenants for an MSP-managed fleet.

Security implications

This control is primarily about consistency and supportability rather than security. The main risk of leaving it unconfigured is divergence between machines, which makes troubleshooting and standardized imaging harder, especially across multiple customer tenants in an MSP context.

How to configure

Open Group Policy Management Console (gpmc.msc) on a domain controller or a workstation with RSAT installed.
Create or edit a GPO linked to the OU containing the target computer configurations. We recommend a dedicated baseline GPO (e.g. SEC – USB & Removable Storage) instead of editing Default Domain Policy.
Navigate to Computer Configuration > Administrative Templates > System > Removable Storage Access.
Open CD and DVD: Deny Read Access and set it to Enabled (high-security environments).
Click OK and close the editor.
On the target endpoint, run gpupdate /force (or wait for the next refresh cycle), then verify with rsop.msc or gpresult /h report.html.

Direct registry path: HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\{53f56308-b6bf-11d0-94f2-00a0c91efb8b}\Deny_Read. You can apply the same change with PowerShell:

New-Item -Path 'HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\{53f56308-b6bf-11d0-94f2-00a0c91efb8b}' -Force | Out-Null
Set-ItemProperty -Path 'HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\{53f56308-b6bf-11d0-94f2-00a0c91efb8b}' -Name 'Deny_Read' -Value <value> -Type DWord

Registry mapping

Registry pathHKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\{53f56308-b6bf-11d0-94f2-00a0c91efb8b}

Value nameDeny_Read

Value typeREG_DWORD

Enabled valueEnabled (high-security environments)

Disabled valueNot configured

Frequently asked questions

What does the CD and DVD: Deny Read Access Group Policy do?

Prevents reading from CD/DVD drives.

Where do I find this setting in the GPO editor?

Open <code>gpmc.msc</code>, then navigate to <code>Computer Configuration > Administrative Templates > System > Removable Storage Access</code> and look for <strong>CD and DVD: Deny Read Access</strong>.

What is the Microsoft default value?

<code>Not configured</code> on a fresh Windows install. Domain-joined machines may inherit a different value if a baseline GPO is already in place.

What value do security baselines recommend?

<code>Enabled (high-security environments)</code> – aligned with CIS, NIST, and DISA STIG guidance for current Windows versions.

Can I configure this without a GPO?

Yes, by writing to <code>HKLM\Software\Policies\Microsoft\Windows\RemovableStorageDevices\{53f56308-b6bf-11d0-94f2-00a0c91efb8b}\Deny_Read</code> directly via <code>regedit</code>, PowerShell, or Intune. A GPO is preferred for centrally managed environments because it survives reimaging and is easier to audit.