The "SAC id" command incorrectly identifies an EM64T processor as an AMD64 processor in Windows Server 2003

Consider the following scenario. At a Special Administration Console (SAC) command prompt, you type SAC id to display identification information about a Microsoft Windows Server 2003-based computer. This computer is using an Intel Extended Memory 64-bit Technology (EM64T) processor. In this scenario, the command incorrectly identifies the processor as an AMD64 processor.

Note The SAC id command is used with the Special Administration Console (SAC). The SAC is included in the Emergency Management Services tools in Windows Server 2003.

For more information about the Emergency Management Services tools and about SAC commands, visit the following Microsoft Web page:

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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.

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to 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.

Windows Server 2003, x86-based versions

Windows Server 2003, x64-based versions

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. To apply this hotfix, you must add a REG_SZ entry that is named "ActualProcessorArchitecture" and that has a value of EM64T to the following registry subkey: To add this registry entry, follow these steps:

1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SacDrv\Parameters
   Note If the Parameters subkey does not exist, you must create it. To create this subkey, follow these steps:
   1. On the Edit menu, point to New, and then click Key.
   2. For the name of the key, type Parameters, and then press ENTER.
3. Click the Parameters subkey, point to New on the Edit menu, and then click String Value.
4. For the name of the string value, type ActualProcessorArchitecture, and then press ENTER.
5. Right-click ActualProcessorArchitecture, and then click Modify.
6. In the Value data box, type EM64T, and then click OK.
7. Quit Registry Editor.

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 Server 2003 Service Pack 2.

When you view the PROCESSOR_ARCHITECTURE registry entry to determine the processor type of a Windows Server 2003-based computer that is using an EM64T processor, the registry subkey is set to AMD64. The hotfix that is mentioned in the "Resolution" section does not resolve this issue.

The PROCESSOR_ARCHITECTURE registry entry is located in the following subkey: For more information about how to determine the type of processor that your computer uses, click the following article number to view the article in the Microsoft Knowledge Base: For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Technical support for Windows x64 editions

Your hardware manufacturer provides technical support and assistance for Microsoft Windows x64 editions. Your hardware manufacturer provides support because a Windows x64 edition was included with your hardware. Your hardware manufacturer might have customized the Windows x64 edition installation with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your Windows x64 edition. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site: For product information about Microsoft Windows Server 2003 x64 editions, visit the following Microsoft Web site: The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.