Slow Network Performance with Service Pack 4, 5, 6, or 6a (249799)
The information in this article applies to:
- Microsoft Windows NT Server 4.0 Terminal Server Edition
- Microsoft Windows NT Server 4.0 SP4
- Microsoft Windows NT Server 4.0 SP5
- Microsoft Windows NT Server 4.0 SP6
- Microsoft Windows NT Workstation 4.0 SP4
- Microsoft Windows NT Workstation 4.0 SP5
- Microsoft Windows NT Workstation 4.0 SP6
- Microsoft Windows NT Server, Enterprise Edition 4.0 SP4
- Microsoft Windows NT Server, Enterprise Edition 4.0 SP5
- Microsoft Windows NT Server, Enterprise Edition 4.0 SP6
This article was previously published under Q249799 IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SYMPTOMS
Network performance may be sluggish after you apply Windows NT 4.0 Service Pack 4, 5, 6, or 6a.
CAUSE
A change was made to the Rdr.sys file in Windows NT 4.0 Service Pack 4 to fix an issue with a handle being invalidated when a dismount occurs. This may cause additional network traffic, which may degrade performance.
RESOLUTIONWindows NT Server or Workstation 4.0A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site: NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this fix should have the following file attributes or later:
Date Time Size File name Platform
-------------------------------------------------------------
12/23/1999 04:25p 265,104 rdr.sys Intel
12/23/1999 04:24p 509,392 rdr.sys Alpha
NOTE: You must install the latest Windows NT Service Pack (SP6a) to use this hotfix. Windows NT SP6 is required by Rdr.sys dependencies on SP6, which means that Rdr.sys cannot be fixed for any previous Service Pack version.
Using the hotfixed version of Rdr.sys that resolves this problem with any other service pack is not supported.
Windows NT Server 4.0, Terminal Server EditionTo resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the
Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
STATUSWindows NT Server or Workstation 4.0Microsoft has confirmed that this is a problem in Windows NT 4.0. Windows NT Server 4.0, Terminal Server EditionMicrosoft has confirmed that this is a problem in Windows NT 4.0 Service Packs 4 and 5. This problem was first corrected in Windows NT Server 4.0, Terminal Server Edition Service Pack 6.
Modification Type: | Minor | Last Reviewed: | 9/26/2005 |
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Keywords: | kbHotfixServer kbQFE kbbug kbfix KB249799 |
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