Ports for a MIDI device may still appear as available in a MIDI application after you disconnect the device from a Windows Vista-based computer

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After you disconnect a MIDI device from a Windows Vista-based computer, ports for the device may still appear as available in a MIDI application.

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 must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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, 32-bit versions
File nameFile versionFile sizeDateTimePlatform
Audiocore.mofNot applicable4,35206-Jun-200722:08Not applicable
Update.mumNot applicable1,78708-Jun-200722:05Not applicable
X86_3ea44419c9235cc079ebb9b18a3bdab3_31bf3856ad364e35_6.0.6000.20615_none_bfd7232f72231d0d.manifestNot applicable70308-Jun-200722:05Not applicable
X86_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6000.20615_none_753d51ec009a6c30.manifestNot applicable139,51508-Jun-200722:06Not applicable
Windows Vista, 64-bit versions
File nameFile versionFile sizeDateTimePlatform
Amd64_43390f13a9271910697e7beae4f9051d_31bf3856ad364e35_6.0.6000.20615_none_bd939b8035a97c30.manifestNot applicable70708-Jun-200722:05Not applicable
Amd64_microsoft-windows-audio-audiocore_31bf3856ad364e35_6.0.6000.20615_none_d15bed6fb8f7dd66.manifestNot applicable139,55708-Jun-200722:10Not applicable
Audiocore.mofNot applicable4,35206-Jun-200722:08Not applicable
Update.mumNot applicable1,78708-Jun-200722:05Not 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.
More information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 938055 - Last Review: 01/16/2015 09:54:21 - Revision: 4.0

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