Article ID: 326591 - View products that this article applies to.
This article was previously published under Q326591
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/EN-US/ )Description of the Microsoft Windows Registry
Programs that require many NT User handles may stop working when they reach approximately 10,000 handles. For example, this might occur when a program tries to use many NetDDE links.
There is a hard-coded limit of 10,000 NT User handles. This is designed to prevent "bad" (incorrectly behaving) programs from allocating too many NT User handles.
Service Pack InformationTo 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:
(http://support.microsoft.com/kb/260910/EN-US/ )How to Obtain the Latest Windows 2000 Service Pack
Hotfix InformationA 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:
http://support.microsoft.com/contactus/?ws=supportNote 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-Aug-2002 14:13 5.0.2195.5265 42,256 Basesrv.dll 15-Aug-2002 14:13 5.0.2195.5907 222,992 Gdi32.dll 15-Aug-2002 14:13 5.0.2195.6011 708,880 Kernel32.dll 15-Aug-2002 14:13 5.0.2195.4733 332,560 Msgina.dll 15-Aug-2002 14:13 5.0.2195.6000 379,664 User32.dll 15-Aug-2002 14:13 5.0.2195.5968 369,936 Userenv.dll 15-Aug-2002 14:10 5.0.2195.6017 1,642,416 Win32k.sys 15-Aug-2002 08:30 5.0.2195.6013 179,472 Winlogon.exe 15-Aug-2002 14:13 5.0.2195.5935 243,472 Winsrv.dll 15-Aug-2002 14:13 5.0.2195.6011 708,880 Kernel32.dll 15-Aug-2002 14:13 5.0.2195.6017 1,642,416 Win32k.sys 15-Aug-2002 14:13 5.0.2195.5935 243,472 Winsrv.dll
Required Registry ValuesWARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To use this hotfix, you must create or modify the following registry values to specify the number of NT User handles that you want to allow. The maximum number is 18,000.
HKLM\Software\Microsoft\Windows NT\CurrentVersion\Windows\USERPostMessageLimit (REG_DWORD)
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:
265173For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/265173/EN-US/ )The Datacenter Program and Windows 2000 Datacenter Server Product
(http://support.microsoft.com/kb/296861/EN-US/ )Use QChain.exe to Install Multiple Hotfixes with One Reboot
Article ID: 326591 - Last Review: February 22, 2007 - Revision: 2.8