NET USE /d Returns Error 2404 After Applying Service Pack 4

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Article ID: 214563 - View products that this article applies to.
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After you install Windows NT version 4.0 Service Pack 4 on a workstation or server, you may receive the following error when you run a script or batch file that connects to a resource, runs an application, and then disconnects from that resource:
The device is being accessed by an active process. More help is available by typing NET HELPMSG 2404.
An example script would be similar to the following:
   net use q: \\servername\share
   net use q: /d


The redirector holds a reference to the File Control Block (FCB) in the cache. A fix to the Redirector (Rdr.sys) in Service Pack 4 was made to check for open references before tearing down the session.


To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
  • 152734 how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:;EN-US;CNTACTMS


Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.


Article ID: 214563 - Last Review: November 2, 2013 - Revision: 4.0
Applies to
  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Server 4.0 Enterprise Edition
  • Microsoft Windows NT Workstation 4.0 Developer Edition
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