Article ID: 2641834 - View products that this article applies to.
On a Windows Embedded Standard 2009 device, a USB storage device may not be removable using Safely Remove Hardware OS feature.
This may happen if the OS is booted with the USB flush memory device connected when the Registry filter feature is enabled.
This issue may occur due to an incorrect reference count generated when the OS is created with the Registry Filter feature enabled, and a USB storage device is connected during the boot process.
To work around this issue:
Shut down the computer before you remove the USB device.
To prevent this issue:
Steps to reproduce:
USB Mass Storage Device is safely removed.
USB Mass Storage Device cannot be removed, as the device status says - it is still being used.
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.