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If you reconnect a removable storage device to a Windows Vista-based computer, Windows Vista cannot find the removable storage device

Consider the following scenario:
  • On Windows Vista-based computer, you connect a removable storage device, such as a USB device, to the computer. After you do that, Windows Vista assigns a drive letter to the removable device in the system device context.
  • You disconnect the removable device from the computer, and then you map a network drive by using the drive letter that was previously assigned to the removable device.
In this scenario, if you reconnect the removable storage device to the computer, Windows Vista cannot find the device.

Note If you disconnect the network drive, the drive letter is assigned to the removable storage device, and you can access the device.

Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack

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.


No prerequisites are required.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released 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 item in Control Panel.
Windows Vista, x86-based versions
File nameFile versionFile sizeDateTimePlatform
Update.mumNot Applicable2,01230-Oct-200722:04Not Applicable
X86_97f1b6fedfdf33794044b418716b372d_31bf3856ad364e35_6.0.6000.20711_none_6169d6a7185faa81.manifestNot Applicable70530-Oct-200722:04Not Applicable
X86_microsoft-windows-mountpointmanager_31bf3856ad364e35_6.0.6000.20711_none_f131b349230407b5.manifestNot Applicable9,77730-Oct-200722:04Not Applicable
Windows Vista, x64-based versions
File nameFile versionFile sizeDateTimePlatform
Amd64_13a6f57dce923efb56331ab6c430d077_31bf3856ad364e35_6.0.6000.20711_none_dc7e34a0e8ab603b.manifestNot Applicable70930-Oct-200722:04Not Applicable
Amd64_microsoft-windows-mountpointmanager_31bf3856ad364e35_6.0.6000.20711_none_4d504eccdb6178eb.manifestNot Applicable9,79530-Oct-200722:23Not Applicable
Update.mumNot Applicable2,02430-Oct-200722:04Not Applicable
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 Vista Service Pack 1.
For more information about a similar issue on a Windows XP-based computer, click the following article number to view the article in the Microsoft Knowledge Base:
297694 New drive or mapped network drive not available in Windows Explorer
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 943986 - Last Review: 05/15/2008 02:23:21 - Revision: 2.1

Windows Vista Enterprise 64-bit Edition, Windows Vista Home Basic 64-bit Edition, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate 64-bit Edition, Windows Vista Business, Windows Vista Business 64-bit Edition, Windows Vista Enterprise, Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Ultimate

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