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When you drag a file from one location to another in Windows Explorer, and then you click No in the Confirm File Replace dialog box, the files may be deleted from the source location and not copied to the destination as expected.
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.
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.
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, submit a request to 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.
No prerequisites are required.
Hotfix Replacement Information
This hotfix does not replace any other hotfixes.
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
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
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