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Article ID: 940275 - Last Review: January 16, 2015 - Revision: 8.0

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You may experience one of the following symptoms on a Windows XP SP2-based computer after you apply security update 930178 (MS07-021).

Symptom 1

Consider the following scenario. On a Windows XP SP2-based computer, you use the Certificate Import Wizard to import a certificate into the Trusted Root Certification Authorities Certificates store. In this scenario, a blank message appears. The message contains a Yes button and a No button. If you click Yes, the certificate is installed successfully.

Instead of a blank message, you expect to receive the following confirmation message:
You are about to install a certificate from a certification authority (CA) claiming to represent: CANameCertificate_Information Do you want to install this certificate?
Note In this message, CAName is a placeholder for the name of the certification authority, and Certificate_Information is a placeholder for the information about the particular certificate.

You experience this problem if you run the Certificate Import Wizard by using an account that does not have Administrator rights.

Symptom 2

You log on to a Windows XP SP2-based portable computer by using an account that does not have Administrator rights. Then, even though the battery power is low, the text balloon warning for Low Battery Alarm does not appear in the notification area. You may still receive a yellow triangle exclamation point in the notification area. However, you may not receive the text balloon warning.

Symptom 3

You experience slow performance on a Windows XP SP2-based portable computer. Additionally, the computer may stop responding when the Low Battery Alarm warning occurs. This symptom occurs when the following conditions are true:
  • You log on to the computer by using an account that does not have Administrator rights.
  • You log on to the computer by using the Switch User option.


Update information

How to obtain this update

The following file is available for download from the Microsoft Download Center:

Collapse this imageExpand this image
Download the Update for Windows XP (KB940275) package now. (

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591  ( ) How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.


To apply this update, you must have Windows XP Service Pack 2 (SP2) installed on the computer.

Restart requirement

You have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The English version of this update 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 XP with Service Pack 2, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirement


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More information

To install a certificate on the computer, follow these steps:
  1. Locate the certificate file that you want to install on the computer.

    Note A certificate file has a .crt file name extension.
  2. Double-click the certificate file, and then click the General tab.
  3. Click Install Certificate.
  4. In the Certificate Import Wizard, click Next.
  5. Click Automatically select the certificate store based on the type of certificate, click Next, and then click Finish.
For more information about security update MS07-021, visit the following Microsoft Web site: (
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:
824684  ( ) Description of the standard terminology that is used to describe Microsoft software updates

Applies to
  • Microsoft Windows XP Service Pack 2, when used with:
    • Microsoft Windows XP Professional
    • Microsoft Windows XP Home Edition
kbnosurvey kbarchive atdownload kbexpertiseadvanced kbbug kbfix kbhotfixserver kbqfe KB940275
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