Consider the following scenario:

•	Your computer is running Microsoft Windows Server 2003 or Microsoft Windows 2000.
•	The computer is running Terminal Services in Application Server mode.
•	Printer redirection is enabled.
•	The SetPrinter function is set to level 2.

In this scenario, you experience the following symptoms:

•	The registry size limit is exceeded. Additionally, the following event message is logged in the System log: Event Type: Error Event Source: Srv Event Category: None Event ID: 2020 Date: Date Time: Time User: N/A Computer: Server Name Description: The server was unable to allocate from the system paged pool because the pool was empty.
•	Users may be unable to log on to the server that has Terminal Services enabled. In this case, the following event message is logged in the System log: Event Type: Error Event Source: Userenv Event Category: None Event ID: 1000 Date: Date Time: Time User: NT AUTHORITY\SYSTEM Computer: ComputerName Description: RegLoadKey failed. Return value Insufficient system resources exist to complete the requested service for C:\Documents and Settings\ntuser.dat.
•	The default registry hive file that is located in the %SystemRoot%\System32\Config folder may increase. For example, the size may exceed more than 5 megabytes (MB).
•	Users who are connected through Terminal Services sessions may experience slow response or the client may appear to stop responding (hang) when it runs programs on the Terminal Server computer. Additionally, users may receive error messages that are related to system memory.

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This problem occurs because temporary registry entries that contain printer information are not deleted when a user logs off. These undeleted registry entries accumulate until the default registry hive file exceeds the registry size limit.

On a terminal server, redirected printers are installed when a user logs on. The SetPrinter function stores detailed information about the printer in the buffer. When the user logs off, the printer is uninstalled and the corresponding registry values that contain printer information are deleted.

To support backward compatibility, the naming conventions for the registry values that store printer information for the currently logged on users are different when the SetPrinter function is set to level 2. For example, when a user manually configures printer settings, the registry values that are stored under the HKEY_CURRENT_USER\.Default\Printers\DevModes2 registry subkey are similar to the following:The registry value that is created by using the earlier naming convention is similar to the following:When the SetPrinter function is set to level 2, the registry entries that contain printer information appear to be automatically created. Because the removal process only looks for and deletes registry values that are manually created, these temporary registry entries are not deleted when a user logs off.

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Windows 2000

Hotfix information

Important This hotfix prevents new values from being written to the registry, but this hotfix does not delete existing registry values. Therefore, you must complete the steps that are included in the "Workaround" section before you apply this hotfix. 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.

Prerequisites

To apply this hotfix, you must have Windows 2000 Service Pack 4 (SP4) installed on the computer.

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.

   Date         Time   Version           Size  File name
   --------------------------------------------------------
   09-Sep-2005  00:27  5.0.2195.7070  115,472  Winspool.drv
   25-Feb-2005  05:13  6.1.22.4       371,936  Updspapi.dll

Hotfix installation information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

To enable this hotfix, you must create the PrinterMaskKey registry subkey. To do this, follow these steps:

1.	Click Start, click Run, type regedit, and then click OK.
2.	Locate the following registry subkey: HKEY_USERS\.default\printers
3.	Right-click the registry subkey that you located in step 2, point to New, click Key, type PrinterMaskKey, and then press ENTER.
4.	Exit Registry Editor.

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Windows Server 2003

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information

Important This hotfix prevents new values from being written to the registry, but this hotfix does not delete existing registry values. Therefore, you must complete the steps that are included in the "Workaround" section before you apply this hotfix.

Prerequisites

No prerequisites are required.

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

Windows Server 2003, 32-bit versions

File name	File version	File size	Date	Time	Platform
Winspool.drv	5.2.3790.2740	150,528	05-Jul-2006	16:30	Not Applicable

Windows Server 2003, x64-based versions

File name	File version	File size	Date	Time	Platform	SP requirement	Service branch
Winspool.drv	5.2.3790.2740	252,928	05-Jul-2006	17:03	Not Applicable	SP1	SP1QFE
Wwinspool.drv	5.2.3790.2740	150,528	05-Jul-2006	17:03	Not Applicable	SP1	WOW

Windows Server 2003, Itanium-based versions

File name	File version	File size	Date	Time	Platform	SP requirement	Service branch
Winspool.drv	5.2.3790.2740	410,112	05-Jul-2006	17:02	Not Applicable	SP1	SP1QFE
Wwinspool.drv	5.2.3790.2740	150,528	05-Jul-2006	17:02	Not Applicable	SP1	WOW

Hotfix installation information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

To enable this hotfix, you must create the PrinterMaskKey registry subkey. To do this, follow these steps:

1.	Click Start, click Run, type regedit, and then click OK.
2.	Locate the following registry subkey: HKEY_USERS\.default\printers
3.	Right-click the registry subkey that you located in step 2, point to New, click Key, type PrinterMaskKey, and then press ENTER.
4.	Exit Registry Editor.

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To work around this problem, follow these steps:

1.	Make sure that all users have logged off the server, and then remove the server from the production environment.
2.	Restart the server.
3.	If the memory leak has not exceeded the registry size limit, go to step 4. If the memory leak has exceeded the registry size limit, follow these steps: a. Install a parallel installation of Windows on the same partition as the installation that does not start. For more information about how to install a parallel installation of Windows, click the following article number to view the article in the Microsoft Knowledge Base: 266465 (http://support.microsoft.com/kb/266465/) How to perform a parallel installation of Windows 2000 or Windows Server 2003 b. Restart the computer by using the parallel installation of Windows that you installed in step 3a. c. Rename the DEFAULT registry hive from the problem installation of Windows to DEFAULT.BAK. The path of the hive to rename is %Systemroot%\System32\Config\DEFAULT. d. Load the default.bak registry hive. To do this, follow these steps: 1. Click Start, click Run, type regedit, and then click OK. 2. Click HKEY_LOCAL_MACHINE, click Load Hive on the File menu, and then select the registry hive file that you backed up in step 3c. 3. Name the newly loaded registry hive. For example, name the new registry hive TEMP-DEFAULT. e. Locate and delete the following subkey: HKEY_LOCAL_MACHINE\TEMP-DEFAULT\printers\Devmodes2 Note TEMP-DEFAULT is the name of the registry hive that you loaded in step 3d. f. Re-create a blank Devmodes2subkey under HKEY_LOCAL_MACHINE\TEMP-DEFAULT\printers. g. Click the HKEY_LOCAL_MACHINE\TEMP-DEFAULT hive, and then click Save key in the File menu. h. Save the hive as DEFAULT in the %Systemroot%\System32\Config folder. i. In Registry Editor, click Unload Hive on the File menu. j. Restart the computer.
4.	If the memory leak has not exceeded the registry size limit, delete and then re-create the following registry subkey: HKEY_USERS\.default\printers\Devmodes2
5.	Monitor the size of the default registry hive file that is located in the %Systemroot%\system32\config folder. If the size of the default registry hive file exceeds the registry size limit, repeat step 3.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Server 2003 Service Pack 2.

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For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the standard terminology that is used to describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:

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