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The memory usage for the Csrss.exe process keeps increasing if a drive letter is frequently changedArticle ID: 979234 - View products that this article applies to. On This PageSYMPTOMSThe memory usage of the Csrss.exe process keeps increasing if a drive letter is frequently changed on a computer that is running Windows Server 2008 or Windows Vista.
Additionally, you encounter one or more of the following symptoms:
CAUSEWhen a driver letter that is related to a network drive mapping, to a local volume mount, or to a local volume unmount is changed, a new thread starts in the Csrss.exe process. This thread sends out a broadcast that a drive letter for a drive has changed. After it sends the broadcast, this thread exits. However, some allocated memory is not freed when the thread exits. Therefore, you encounter the issue that is described in "Symptom" section when the drive letter is frequently changed. RESOLUTIONHotfix 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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.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, contact 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=support 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.
(http://support.microsoft.com/contactus/?ws=support)
PrerequisitesTo apply this hotfix, your computer must be running one of the following operating systems:
935791
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/935791/
)
How to obtain the latest Windows Vista service pack
968849
(http://support.microsoft.com/kb/968849/
)
How to obtain the latest service pack for Windows Server 2008
Restart requirementYou must restart the computer after you apply this hotfix.Hotfix replacement informationThis hotfix does not replace a previously released hotfix.File informationThe English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.Windows Vista and Windows Server 2008 file information notesImportant Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
For all supported x86-based versions of Windows Server 2008 and of Windows VistaCollapse this table
For all supported x64-based versions of Windows Server 2008 and of Windows VistaCollapse this table
For all supported IA-64-based versions of Windows Server 2008Collapse this table
STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
936087
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/936087/
)
A handle leak occurs in Windows Server 2003 when an application frequently maps and unmaps shared drives
824684
(http://support.microsoft.com/kb/824684/
)
Description of the standard terminology that is used to describe Microsoft software updates
Additional file informationAdditional file information for Windows Vista and for Windows Server 2008Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008Collapse this table
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008Collapse this table
Additional files for all supported IA-64-based versions of Windows Server 2008Collapse this table
PropertiesArticle ID: 979234 - Last Review: February 9, 2010 - Revision: 1.0 APPLIES TO
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