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"Stop error code 0x00000050" occurs when you start the computer for the first time

This article was previously published under Q329772
This article has been archived. It is offered "as is" and will no longer be updated.
You may receive the following Stop error message when you start the computer the first time:
Stop 0x00000050 (0xE1626822,0x00000001,0x804EFF46,0x00000002)
The problem occurs when a registry value is set to NULL, but it is supposed to be a double-null terminated string. When the computer is initialized, it references the null string and the Stop error that is described in the "Symptoms" section occurs.

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. 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

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.The English version of this fix 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   --------------------------------------------------   15-Nov-2001  13:27                     5,149   01-Oct-2002  10:23  5.0.2195.6076  1,688,832  Ntkrnlmp.exe   01-Oct-2002  10:23  5.0.2195.6076  1,688,448  Ntkrnlpa.exe   01-Oct-2002  10:23  5.0.2195.6076  1,709,120  Ntkrpamp.exe   01-Oct-2002  10:23  5.0.2195.6076  1,666,496  Ntoskrnl.exe   06-Sep-2002  08:10           3,584  Spmsg.dll   06-Sep-2002  08:10          46,080  Spuninst.exe   12-Jun-2001  19:05  5.0.2195.3727      3,856  Svcpack1.dll				

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4. This problem is resolved in Windows XP.
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server Product
0x21a, 0xC000021A, 0x50

Article ID: 329772 - Last Review: 12/07/2015 12:48:27 - Revision: 4.0

Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Professional Edition

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