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When you try to start your Windows 2000-based computer, the computer may stop responding, or "hang," during the memory check phase of the startup process.
This problem occurs if both of the following conditions are true:
The amount of random access memory (RAM) that is installed on the computer exceeds the amount that is supported by the operating system.
Physical Address Extensions (PAE) is turned on in the Boot.ini file.
This problem only occurs with specific original equipment manufacturer (OEM) server configurations. If you run the kernel debugger, the system will appear to be stuck executing the MmInitializeMemoryLimits() function. On some computers, the Windows 2000 operating system is set to only recognize 8 gigabytes (GB) of RAM. Memory more than this maximum setting is ignored. In the condition that is described in the "Symptoms" section of this article, the memory is not ignored, and this causes the computer to stop responding.
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.
No prerequisites are required.
You must restart your computer after you apply this hotfix.
Hotfix Replacement Information
This hotfix does not replace any other hotfixes.
The English version of this hotfix has the file attributes (or later) 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.
Date Time Version Size File name -------------------------------------------------------------- 26-Jun-2003 18:26 5.0.2195.6762 29,712 Mountmgr.sys 05-Aug-2003 20:46 5.0.2195.6799 1,696,640 Ntkrnlpa.exe 05-Aug-2003 20:46 5.0.2195.6799 1,717,568 Ntkrpamp.exe
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:
816915 New Naming Schema for Microsoft Windows Hotfix Packages