"0x00000027" or "0x00000050" Stop error in the Rdbss.sys driver in Windows 7 SP1 or Windows Server 2008 R2 SP1

Symptoms

The Stop error resembles one of the followings:


STOP: 0x00000027 (parameter1, parameter2, parameter3, parameter4)

STOP: 0x00000050 (parameter1, parameter2, parameter3, parameter4)


Notes

  • The parameters in the error messages vary, depending on the configuration of the computer.

  • Not all "0x00000027" or "0x00000050" Stop errors are caused by this problem.

Cause

This issue occurs because there is a race condition in the Redirected Drive Buffering Subsystem (Rdbss.sys) driver.

Hotfix information

Important Do not install a language pack after you install this hotfix. If you do, the language-specific changes in the hotfix will not be applied, and you will have to reinstall the hotfix. For more information, see Add language packs to Windows.

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 website:

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

Prerequisites

To apply this hotfix, you must install Service Pack 1 (SP1) for Windows 7 or Windows Server 2008 R2.

Registry information

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

Restart requirement

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

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information and notes

Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760 1.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are

    listed separately in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Rdbss.sys

6.1.7601.22998

247,808

12-Mar-2015

01:52

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Rdbss.sys

6.1.7601.22998

316,928

12-Mar-2015

02:05

x64

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Rdbss.sys

6.1.7601.22998

740,352

12-Mar-2015

01:15

IA-64

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File property

Value

File name

X86_bc01603d5873ccf562da4fb1398b1615_31bf3856ad364e35_6.1.7601.22998_none_fe3c310e2a6f965c.manifest

File version

Not applicable

File size

693

Date (UTC)

12-Mar-2015

Time (UTC)

06:46

Platform

Not applicable

File name

X86_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7601.22998_none_5c134f34d9067e63.manifest

File version

Not applicable

File size

21,395

Date (UTC)

12-Mar-2015

Time (UTC)

03:18

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File property

Value

File name

Amd64_6ff73955534e6e1ad85a8b330cbe63ef_31bf3856ad364e35_6.1.7601.22998_none_63bb43fde447bacf.manifest

File version

Not applicable

File size

697

Date (UTC)

12-Mar-2015

Time (UTC)

06:46

Platform

Not applicable

File name

Amd64_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7601.22998_none_b831eab89163ef99.manifest

File version

Not applicable

File size

21,401

Date (UTC)

12-Mar-2015

Time (UTC)

03:49

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File property

Value

File name

Ia64_3a31cae981216b2421a5c977167a9b69_31bf3856ad364e35_6.1.7601.22998_none_22baaf50bc68f2d2.manifest

File version

Not applicable

File size

695

Date (UTC)

12-Mar-2015

Time (UTC)

06:46

Platform

Not applicable

File name

Ia64_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7601.22998_none_5c14f32ad904875f.manifest

File version

Not applicable

File size

21,398

Date (UTC)

12-Mar-2015

Time (UTC)

03:14

Platform

Not applicable

Status

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

References

See the terminology that Microsoft uses to describe software updates.

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