0x77 or 0x7A Stop error message may occur when you press the power button on an ACPI-compliant computer that is running Windows 2000 or Windows Server 2003

When you press the power button on an Advanced Configuration and Power Interface (ACPI)-compliant computer that is running Microsoft Windows 2000 or Microsoft Windows Server 2003, you may receive a 0x77 or 0x7A Stop error message.

This problem occurs because a SCSI adaptor does not receive a stop request while the system is shutting down.

To resolve this problem, install the hotfix that is described in this article, and then configure a new registry option that is named NeedsSystemShutdownNotification. This new registry option controls whether a particular SCSI adaptor must be sent a stop request while the system is shutting down. For information about how to add and to configure the registry option, see the "More Information" section.

Note Computers that are running Windows Server 2003 do not need to apply this hotfix because the registry key is supported natively. To enable this fix for Windows Server 2003, follow the steps in the "More Information" section.

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.

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 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

Microsoft Windows 2000 Service Pack 3 (SP3)

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other 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 tool in Control Panel.

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

Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To configure the new registry option, add a DWORD that is named NeedsSystemShutdownNotification and that has a value of 1 to the following registry subkey: Note You must select the correct subkeys for Bus, deviceId, and device. For example, for a PCI bus device, you might add a DWORD that is named NeedsSystemShutdownNotification and that has a value of 1 to a registry subkey that is similar to the following: To configure the new registry option, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Bus\deviceId\device\Device Parameters\ScsiPort
   
   Note If the ScsiPort subkey does not exist, you must create it. To do this, follow these steps:
   1. Locate and then click the following subkey in the registry:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Bus\deviceId\device\Device Parameters
   2. On the Edit menu, point to New, and then click Key.
   3. Type ScsiPort for the name of the subkey, and then press ENTER.
   4. Click the ScsiPort subkey.
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type NeedsSystemShutdownNotification for the name of the DWORD, and then press ENTER.
5. Right-click NeedsSystemShutdownNotification, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Quit Registry Editor.

Note To configure the adaptor driver to use the value, modify the .inf file for the adaptor driver with information that is similar to the following: For more information about how to configure the adaptor driver, see the latest version of the Microsoft Windows Driver Development Kit (DDK) documentation. For additional information about the DDK, visit the following Microsoft Web page: For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base: