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Article ID: 834937 - Last Review: January 12, 2015 - Revision: 3.0

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When you start a program in Microsoft Windows XP, the program may take longer than expected to start.


This problem occurs when you turn on client-side caching in Windows XP, and the program that you start accesses a mapped drive that has been cached offline by client-side caching.


Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389  ( ) How to obtain the latest Windows XP service pack

Hotfix information

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. 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: (
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 hotfix 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.

Windows XP

Date         Time   Version            Size    File name
21-Jan-2004  01:44  5.1.2600.1334      92,160  Cscdll.dll       
20-Jan-2004  23:14  5.1.2600.1334     403,456  Mrxsmb.sys
20-Jan-2004  23:14  5.1.2600.1334     156,672  Rdbss.sys

Windows XP 64-Bit Edition Version 2003

Date         Time   Version            Size    File name     Platform
20-Jan-2004  23:56  5.1.2600.1334     235,520  Cscdll.dll     IA-64
20-Jan-2004  23:14  5.1.2600.1334   1,267,200  Mrxsmb.sys
20-Jan-2004  23:14  5.1.2600.1334     494,976  Rdbss.sys
21-Jan-2004  01:44  5.1.2600.1334      92,160  Wcscdll.dll    x86


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

More information

For additional 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

Applies to
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbwinxpsp2fix kbwinxp64bit2003presp1fix kbcaching kbqfe kbwinxppresp2fix kbfix kbbug KB834937
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