Windows Server 2008 may restart unexpectedly when you open the Hyper-V manager console to manage virtual machines

Applies to: Windows Server 2008 DatacenterWindows Server 2008 EnterpriseWindows Server 2008 Standard

Not sure if this is the right fix? We've added this issue to our memory dump diagnostic which can confirm.


On a Windows Server 2008-based computer that has the Hyper-V role installed, you open the Hyper-V manager console to manage virtual machines. After you do this, Windows Server 2008 restarts unexpectedly. Additionally, you receive a Stop error message that resembles the following:

0x000000E3 (parameter1, parameter2, parameter3, parameter4) RESOURCE_NOT_OWNED in rdbss.sys
  • The parameters in this Stop error message vary, depending on the configuration of the computer.
  • Not all "0x000000E3" Stop error messages are caused by this problem.
When this issue occurs, the following events may be logged in the System log:


This issue occurs because the Redirected Driver Buffering SubSystem (Rdbss.sys) driver uses an incorrect method to acquire or release resources.


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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.


To apply this hotfix, you must have Windows Server 2008 installed on the computer.

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.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

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 Server 2008 note

The .manifest files and the .mum files that are installed in each environment are listed separately in the "Additional file information for Windows Server 2008" section. These files and their associated .cat (security catalog) files are critical to maintaining the state of the updated component. The .cat files are signed with a Microsoft digital signature. The attributes of these security files are not listed.

For all supported x64-based versions of Windows Server 2008

File nameFile versionFile sizeDateTimePlatform


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about the Redirected Driver Buffering SubSystem driver, visit the following Microsoft Web site: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

Additional file information for Windows Server 2008

Additional files for all supported x64-based versions of Windows Server 2008

File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-rdbss_31bf3856ad364e35_6.0.6001.22304_none_b681150f32e0e03e.manifestNot Applicable7,11307-Nov-200809:08Not Applicable
Package_for_kb959403_client_1~31bf3856ad364e35~amd64~~ Applicable1,37507-Nov-200818:40Not Applicable
Package_for_kb959403_client~31bf3856ad364e35~amd64~~ Applicable1,43907-Nov-200818:40Not Applicable
Package_for_kb959403_sc_0~31bf3856ad364e35~amd64~~ Applicable1,42907-Nov-200818:40Not Applicable
Package_for_kb959403_sc~31bf3856ad364e35~amd64~~ Applicable1,43107-Nov-200818:40Not Applicable
Package_for_kb959403_server_0~31bf3856ad364e35~amd64~~ Applicable1,43307-Nov-200818:40Not Applicable
Package_for_kb959403_server~31bf3856ad364e35~amd64~~ Applicable1,43907-Nov-200818:40Not Applicable
Package_for_kb959403_winpesrv_0~31bf3856ad364e35~amd64~~ Applicable1,43007-Nov-200818:40Not Applicable
Package_for_kb959403_winpesrv~31bf3856ad364e35~amd64~~ Applicable1,43707-Nov-200818:40Not Applicable