Microsoft has issued warnings about a serious flaw in Internet Explorer that allows attackers to hijack a PC via the popular browser. This is a known Vulnerability in Vector Markup Language (VML).

What Is KB925486 All About..?

In response to the known Vector Markup Language (VML) security exploit discussed in KB925568 , Microsoft have released a security patch for users of Windows XP running Internet Explorer 6 (This patch will not work with the beta and RC1 versions of Internet Explorer 7).

How Can I Obtain the Security Patch Detailed in KB925486?

If you have Windows XP Automatic Updates (AU) enabled (more here) then the patch should already have been installed.

You can check if it is installed by going to the Start Menu >> Control Panel >> Add Remove Programs >> Under "Change or Remove programs" make sure the "updates" box is ticked.

...now look towards the bottom of the list for: Security Update for Windows XP (KB925486)

...Not There?

IF you have NOT already noticed the AU facility downloading the patch for you then you can manually download the patch here:

� Microsoft Windows XP Service Pack 1 � Download the update

� Microsoft Windows XP Service Pack 2 � Download the update

Advanced Tips For Installing KB925486

This security update supports the following setup switches for use on the Windows XP Command Line. For instance:

To install the security update without forcing the system to restart, use the following command at a command prompt for Windows XP, assuming you have saved the file to the root of drive c:

Service Pack 2 Only:

windowsxp-kb925486-x86-enu /norestart

Service Pack 1 Only:

IE6.0sp1-KB925486-WindowsXP-x86-enu /norestart

Fig 1.1 - Using the command line switch on a PC running XP SP2

/help Displays the command-line options.

Setup Modes:

/passive Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.

/quiet Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.

Restart Options:

/norestart Does not restart when installation has completed.

/forcerestart Restarts the computer after installation and forces other applications to close at shutdown without saving open files first.

/warnrestart[:x] Displays a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.

/promptrestart Display a dialog box prompting the local user to allow a restart.

Special Options:

/overwriteoem Overwrites OEM files without prompting.

/nobackup Does not back up files needed for uninstallation.

/forceappsclose Forces other programs to close when the computer shuts down.

/log:path Allows the redirection of installation log files.

/integrate:path Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.

/extract[:path] Extracts files without starting the Setup program.

/ER Enables extended error reporting.

/verbose Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

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This page was last updated 27th September 2006

KB925486

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