- 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.
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.
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: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\WPDBusEnum\Start
- Click Edit, and then click Modify.
- In the Value data box, change the current value to 2.
- Restart the computer for the change to take effect. When the computer restarts, the Portable Device Enumerator service starts automatically.
Steps to reproduce the problem
- In the Group Policy MMC snap-in on a Windows Server 2008-based computer, enable the following Group Policy object:Computer Configuration/Administrative Templates/System/Removable Storage Access/All Removable Storage classes: Deny all Access
- Connect a USB flash drive to the computer.
- Verify that you can still access this USB flash drive.
- In the Services snap-in, right-click Portable Device Enumerator Service, and then click Start. Now when you try to access the device, you are blocked.
Article ID: 947294 - Last Review: Mar 6, 2008 - Revision: 1