Introduction

Microsoft has released the security bulletin MS12-021. You can view the complete security bulletin by visiting one of the following Microsoft websites:

How to obtain help and support for this security update


Help protect your PC from viruses and from malware:

Virus Solution and Security CenterHelp installing updates:

Support for Microsoft UpdateSecurity solutions for IT professionals:

TechNet Security Troubleshooting and SupportLocal support according to your country:

International Support

Prerequisites

To install this update, you must have Windows Installer 2.0 or a later version installed on the computer. To obtain the latest version of Windows Installer, click the following article number to view the article in the Microsoft Knowledge Base:

893803 Windows Installer 3.1 v2 (3.1.4000.2435) is available

Command-line switches for this update

For information about the various command-line switches that are supported by this update, click the following article number to view the article in the Microsoft Knowledge Base:

262841 Command-line switches for Windows software update packages

Restart information

This update may require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if the required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to allow the restart.

Removal information

To remove this update, use the Add or Remove Programs item in Control Panel.

Update replacement information

This update does not replace any previously released update.

File information

The English (United States) version of this update 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.

For all supported x86-based versions of systems

File name

File version

File size

Date

Time

Product_{1DFC529C-A291-34D4-99F7-B23F3DDEE962}_theMarble.pkgdef

Not applicable

2,459,246

24-Jan-2012

23:25

AppenvStub.dll

10.0.40219.377

459,776

25-Jan-2012

23:59

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