Microsoft KB Archive/838647

= Access violations when you use the /PAE switch in Windows 2000 =

Article ID: 838647

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Datacenter Server

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SYMPTOMS
When you start a Microsoft Windows 2000-based server in physical address extension (PAE) mode by adding the /PAE switch to the Windows 2000 Boot.ini file, this may generate several access violations in PAE-capable programs that use memory space in the extended memory region.



CAUSE
This problem may occur if memory addresses in the extended memory region contain corrupted data, and then PAE-capable programs access this data.

You may be experiencing this problem if you notice that random memory locations have been changed to all zeros in the user-dump file that comes from the program that generates the access violation.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

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

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
You must have Windows 2000 Service Pack 4 (SP4) or later installed to apply this hotfix. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to obtain the latest Windows 2000 service pack

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) 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 ---  10-Feb-2004  19:47  5.0.2195.6897      30,160  Mountmgr.sys 05-Apr-2004 20:39  5.0.2195.6921   1,700,608  Ntkrnlpa.exe 05-Apr-2004 20:39  5.0.2195.6921   1,722,176  Ntkrpamp.exe



For additional information about a similar PAE-related hotfix, click the following article number to view the article in the Microsoft Knowledge Base:

885272 You receive a &quot;Stop 0x0000001a&quot; Stop error message on your Windows 2000 Server-based computer that has Physical Address Extensions (PAE) enabled



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For additional information about this hotfix, click the following article number to view the article in the Microsoft Knowledge Base:

885272 You receive a &quot;Stop 0x0000001a&quot; Stop error message on your Windows 2000 Server-based computer that has Physical Address Extensions (PAE) enabled

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 file naming schema for Microsoft Windows software update packages

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional query words: Win2k Win2000

Keywords: kbbug kbfix kbqfe kbwin2000presp5fix KB838647

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