Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Consider the following scenario:
You are running a Windows Server 2008-based computer.
The All Removable Storage classes: Deny all access Group Policy setting is enabled on the computer.
In this scenario, you can unexpectedly access removable media.
This problem occurs when the Startup Type option for the Portable Device Enumerator service is set to Manual.
To resolve this problem, use one of the following methods.
Method 1: Use the Services snap-in to change the Startup Type option to Automatic
Click Start, click Run, and then type services.msc.
Right-click Portable Device Enumerator, and then click Properties.
In the Startup Type list, click Automatic, and then click OK.
Method 2: Modify the startup value for the WPDBusEnum registry subkey
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
Click Start, click Run, type regedit, and then click OK.
Locate the following registry subkey, and then click it: