The Winlogon.exe process uses excessive CPU resources when a user reinserts a smart card to log on to a Windows Server 2003 Service Pack 1-based terminal server (919578)

SYMPTOMS

Consider the following scenario. You have a Microsoft Windows Server 2003 Service Pack 1 (SP1)-based terminal server in your organization. To log on to this terminal server, a user is required to use an Infineon smart card together with the cryptographic service provider (CSP) that is included with Windows Server 2003. When the user exits the terminal server session, the user removes the smart card from the smart card reader that is connected to the client. Although the local system is configured to lock the terminal server session at this point, the local session remains unlocked.

Then, the user reinserts the smart card. Even though the local session is unlocked, the terminal server session no longer responds. Additionally, CPU usage for the Winlogon instance that belongs to the user session increases to almost 100 percent of the system's resources.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone 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 have Windows Server 2003 SP1 installed to apply this hotfix.

Restart requirement

You must restart your 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 item in Control Panel.Windows Server 2003 with SP1, x86-based versions

File name	File version	File size	Date	Time	Platform
Sccbase.dll	5.2.3790.2733	193,496	26-Jun-2006	14:27	x86

Windows Server 2003 with SP1, x64-based versions

File name	File version	File size	Date	Time	Platform	SP requirement	Service branch
Sccbase.dll	5.2.3790.2733	334,296	25-Jun-2006	23:44	x64	SP1	Not Applicable
Wsccbase.dll	5.2.3790.2733	193,496	25-Jun-2006	23:44	x86	SP1	WOW

Windows Server 2003 with SP1, Itanium-based versions

File name	File version	File size	Date	Time	Platform	SP requirement	Service branch
Sccbase.dll	5.2.3790.2733	652,248	25-Jun-2006	23:45	IA-64	SP1	Not Applicable
Wsccbase.dll	5.2.3790.2733	193,496	25-Jun-2006	23:45	x86	SP1	WOW

MORE INFORMATION

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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.