"Windows - Delayed Write" error message and Event ID 14800 when you try to copy a large file to a Web folder by using WebDAV

If you try to copy a file that is larger than 100 megabytes (MB) to a server location by using the Web Distributed Authoring and Versioning (WebDAV) service, you receive the following error message: You also receive the following event ID:

Event ID 14800 "Windows was unable to save data for file <file_name>. The data has been lost. This error may be caused by a failure of your computer or network connection. Please try to save this file elsewhere.

This problem occurs because, during a WebDAV connection, the WinInet function does not break up the data into sufficiently small chunks. As a result, the system cannot allocate a sufficiently large block of kernel pool memory, and therefore the file-copy operation is unsuccessful.

Microsoft Internet Explorer version 6 for Windows XP

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Microsoft Windows Server 2003

If you experience this problem on a Windows Server 2003-based computer, you can install either Windows Server 2003 Service Pack 1 (SP1) or a hotfix to resolve the problem. After you install the service pack or the hotfix, you must modify the registry to enable the fix.

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Windows Server 2003, 32-bit versions

Windows Server 2003, Enterprise Edition for Itanium-based Systems

Additional installation instructions

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

After you install Windows Server 2003 SP1 or the Windows Server 2003 hotfix that is described in this article, you must modify the registry to enable the fix. You can enable the fix on a per user basis or on a per computer basis. To enable the fix, follow these steps:

1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate the following per user subkey or per computer subkey in the registry.
   • For per user configuration, locate the following registry subkey:
     HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl
     Note If the
     FeatureControl
     subkey does not exist:
     1. Right-click Main, point to New, and then click Key.
     2. Type FeatureControl as the subkey name, and then press ENTER.
   • For per computer configuration, locate the following registry subkey:
     HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl
3. Add the
   FEATURE_BUFFERBREAKING_818408
   subkey.
   1. Right-click FeatureControl, point to New, and then click Key.
   2. Type FEATURE_BUFFERBREAKING_818408 as the subkey name, and then press ENTER.
4. Add the Iexplore.exe entry.
   1. Right-click FEATURE_BUFFERBREAKING_818408, point to New, and then click DWORD Value.
   2. Type Iexplore.exe as the entry name, and then press ENTER.
   3. Right-click Iexplore.exe, and then click Modify.
   4. In the Value data box, type 1, and then click OK.
5. Add the Svchost.exe entry.
   1. Right-click FEATURE_BUFFERBREAKING_818408, point to New, and then click DWORD Value.
   2. Type Svchost.exe as the entry name, and then press ENTER.
   3. Right-click Svchost.exe, and then click Modify.
   4. In the Value data box, type 1, and then click OK.
6. Add the
   Settings
   subkey and the BufferBreakingSize entry.
   1. Right-click FEATURE_BUFFERBREAKING_818408, point to New, and then click Key.
   2. Type Settings as the subkey name, and then press ENTER
   3. Right-click Settings, point to New, and then click DWORD Value.
   4. Type BufferBreakingSize as the entry name, and then press ENTER.
   5. Right-click BufferBreakingSize, and then click Modify.
   6. Make sure that under Base, Hexadecimal is selected. If it is not, click Hexadecimal.
   7. In the Value data box, type 02000000, and then click OK.
7. Quit Registry Editor.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This problem was first corrected in Windows Server 2003 Service Pack 1.