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Article ID: 828346 - Last Review: January 10, 2015 - Revision: 4.0

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This article has been archived. It is offered "as is" and will no longer be updated.

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When you try to map the Win32k.sys file, you receive the following error message:
Stop 0x00000050 (0xa0c50000, 0x00000000, 0x8045b8c7, 0x00000000). 0x00000050 (0xa0c50000, 0x00000000, 0x8045b8c7, 0x00000000)


This problem occurs if your memory resources are too low.


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.


No prerequisites are required.

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
13-Sep-2003  16:59  5.0.2195.6820      29,712  Mountmgr.sys
18-Sep-2003  20:15  5.0.2195.6823   1,697,792  Ntkrnlmp.exe     
18-Sep-2003  20:15  5.0.2195.6823   1,697,088  Ntkrnlpa.exe     
18-Sep-2003  20:15  5.0.2195.6823   1,717,824  Ntkrpamp.exe     
18-Sep-2003  20:15  5.0.2195.6823   1,675,456  Ntoskrnl.exe


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

More information

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

Applies to
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Advanced Server
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbqfe kbbug kbfix kbwin2000presp5fix KB828346
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