Assume that you install the File Server Resource Manager (FSRM) role on a computer that is running Windows Server 2012. You try to eject a USB hard disk drive by clicking "Safely Remove Hardware and Eject Media" in the notification area. In this situation, the USB hard disk drive cannot be safely ejected, and you receive an error message that resembles the following:
This device is currently in use. Close any programs or windows that might be using the device, and then try again.
Note This issue also occurs on other removable media.
This issue occurs because the FSRM service (SrmSvc) holds the device handle.
To resolve this issue, install update rollup 2855336. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
2855336 Windows RT, Windows 8, and Windows Server 2012 update rollup: July 2013
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates