Files Are Deleted When You Drag Them from One Location to Another in Windows Explorer (821739)

CAUSE

This problem may occur if the data object that is moved supports only the CFSTR_FILECONTENTS/CFSTR_FILEDESCRIPTOR clipboard format.

When you drag an object from a folder (including objects in namespace extensions) in Windows Explorer (or from any other program) to a file system folder in Windows Explorer, and the file already exists, Windows Explorer opens the Confirm File Replace dialog box. The move target then communicates to the move source the result of the move operation by setting one of the DROPEFFECT_* flags in the data object's CFSTR_PERFORMEDDROPEFFECT clipboard format. The move source is responsible for deleting the source file after the move operation is completed.

The problem that is described in the "Symptoms" section may occur if you click No when you are prompted to overwrite existing files during a move operation. In this scenario, CFSTR_PERFORMEDDROPEFFECT remains set to DROPEFFECT_MOVE, and this signals the move source that the files have been moved and tells it to delete those files from the source location. This may cause data loss, because existing files are not overwritten in the destination folder, but they are still deleted from the source location.

RESOLUTION

Hotfix Information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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.

Prerequisites

No prerequisites are required.

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) 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.

   Date         Time   Version            Size    File name
   ----------------------------------------------------------
   30-Jun-2003  18:06  5.0.3700.6764   2,357,520  Shell32.dll      
   27-Jun-2003  00:27  5.0.2195.6761   4,607,488  Sp3res.dll

MORE INFORMATION

For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New Naming Schema for Microsoft Windows Hotfix Packages

For more information about the shell clipboard formats, visit the following Microsoft Web site:

http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_programming/transferring/clipboard.asp