Microsoft KB Archive/909916

= Error message when you switch FAT file system-based removable media after you install Update Rollup 1 for Microsoft Windows 2000 SP4: &quot;STOP 0x00000050&quot; =

Article ID: 909916

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
Consider the following scenario. You install Microsoft Update Rollup 1 for Microsoft Windows 2000 Service Pack 4 (SP4). Then, you switch the FAT file system-based removable media that is currently in the computer. In this scenario, you receive a Stop error message that is similar to the following:

STOP 0x00000050

Page Fault in Non-Paged Area

Note The  values may vary.

For example, this problem may occur when you remove a floppy disk, insert a new floppy disk, and then try to read the new floppy disk. This problem may occur with any removable media that has a FAT file system format.



CAUSE
This problem is caused by a bug in the version of the FastFat.sys file that is distributed in Update Rollup 1 for Windows 2000 SP4.



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 phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;[LN;CNTACTMS]

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 be running Windows 2000 SP4 to install this hotfix.

Restart requirement
You must restart the 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.



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 more information about Update Rollup 1 for Windows 2000 SP4, click the following article numbers to view the articles in the Microsoft Knowledge Base:

900345 Fixes that are included in the Update Rollup 1 for Microsoft Windows 2000 Service Pack 4 that is dated June 28, 2005

891861 Update Rollup 1 for Windows 2000 SP4 and known issues

For more 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 more 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: STOP Bug Check 0x50: PAGE_FAULT_IN_NONPAGED_AREA BugCheck 0

Keywords: kbbug kbfix kbwin2000presp5fix kbpubtypekc kbhotfixserver kbqfe KB909916

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