Computer that has an nVidia MCP7A-GeForce 9300 rev B1 motherboard together with an LSI Logic FW533 or an FW643 1394 Host controller crashes after you install Windows 7 or Windows Server 2008 R2

You installed Windows 7 or Windows Server 2008 R2 on a computer that has an nVidia MCP7A-GeForce 9300 rev B1 motherboard together with an LSI Logic FW533 or an FW643 1394 host controller. The computer crashes in the following situations:

• After you disable and then enable the 1394 host controller
• After you uninstall and then install the 1394 host controller
• When you perform a clean install of Windows 7 or Windows Server 2008 R2 and then restart the computer a second time
• After you wake the computer from sleep

For example, you may encounter this issue when you use an nVidia MCP7A-GeForce 9300 rev B1 motherboard together with an LSI Logic FW533 or an FW643 1394 Host controller.

This issue occurs because the 1394 bus driver in Windows 7 does not issue an Open Host Controller Interface (OHCI) Soft Reset command to the 1394 host controller when the computer enters a low power (D3) state. When the 1394 host controller later enters a high power (D0) state, it may generate an incorrect PCI-Express packet. In this situation, the motherboard chipset stops responding.

Note In Windows Vista and earlier versions of Windows, the 1394 bus driver issues an Open Host Controller Interface (OHCI) Soft Reset command to the 1394 host controller when the computer enters a low power (D3) state.

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 the problem described in this article. 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.

Prerequisites

To apply this hotfix, your computer must be running Windows 7 or Windows Server 2008 R2.

Installation instructions

If the 1394 host controller is an add-on card, remove the card from the system before you install Windows 7. After setup is complete, apply this hotfix, and then re-enable the 1394 host controller.

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.

File information

The English (United States) 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 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 MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. 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

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

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

To work around this issue, disable the 1394 host controller in Device Manager or in the BIOS.

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

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

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

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

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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.