This article was previously published under Q331490
This article has been archived. It is offered "as is" and will no longer be updated.
When users log on from a terminal session, Userinit.exe may stop working. Users may also receive the following error message that refers to USERINIT.EXE in the window title bar in the Terminal Services client session:
Application Error: The instruction at "0x77f8fe43" referenced memory at "0x00c50000". The memory could not be "read". Click on OK to terminate the program.
You may also receive the following event message in the system event log on the terminal server:
Event Type: Information Event Source: Application Popup Event Category: None Event ID: 26 Date: MM/DD/YYYY Time: 6:52:31 AM User: N/A Computer: computername Description: Application popup: userinit.exe - Application Error : The instruction at "0x77f8fe43" referenced memory at "0x00c50000". The memory could not be "read". Click on OK to terminate the program
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
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 -------------------------------------------------------- 01-Nov-2002 20:04 5.0.2195.6023 381,712 Printui.dll 01-Nov-2002 20:04 5.0.2195.6112 55,056 Wlnotify.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.
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