DOCUMENT:Q237873  20-MAY-2002  [iis]
TITLE   :Err Msg: Overlapped I/O Error
PRODUCT :Internet Information Server
PROD/VER:winnt:4.0
OPER/SYS:
KEYWORDS:kbWinNT4sp6fix

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Internet Information Server version 4.0 
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SYMPTOMS
========

During authentication, if the account is locked out and the Internet Information
Server (IIS) computer is logging to an ODBC database, the following error
message occurs:

   Overlapped I/O error

This error message is incorrect. Users should receive an error message stating
that their user accounts have been locked out.

CAUSE
=====

The authentication error that the account has been locked out is being reset by
a pending I/O error returned from an asynchronous write to the IIS log. This
causes the incorrect error message to occur.

RESOLUTION
==========

Windows NT Server or Workstation 4.0
------------------------------------

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:

 - http://www.microsoft.com/Windows/ServicePacks/

-or-

 - Q152734 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:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS


Windows NT Server 4.0, Terminal Server Edition
----------------------------------------------

To resolve this problem, obtain the latest service pack for Windows NT Server
4.0, Terminal Server Edition. For additional information, please see the
following article in the Microsoft Knowledge Base:

   Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT
Server 4.0, Terminal Server Edition.

This problem was first corrected in Windows NT Server 4.0 Service Pack 6 and
Windows NT Server 4.0, Terminal Server Edition Service Pack 6.

Additional query words:

======================================================================
Keywords          : kbWinNT4sp6fix 
Technology        : kbiisSearch kbiis400
Version           : winnt:4.0
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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