MS10-042: Vulnerability in Help and Support Center could allow remote code execution

Microsoft has released security bulletin MS10-042. To view the complete security bulletin, visit one of the following Microsoft websites:

• Home users:
  http://www.microsoft.com/security/updates/bulletins/201007.aspx (http://www.microsoft.com/security/updates/bulletins/201007.aspx)
  Skip the details: Download the updates for your home computer or laptop from the Microsoft Update website now:
  http://update.microsoft.com/microsoftupdate/ (http://update.microsoft.com/microsoftupdate/)
• IT professionals:
  http://www.microsoft.com/technet/security/bulletin/MS10-042.mspx (http://www.microsoft.com/technet/security/bulletin/MS10-042.mspx)

How to obtain help and support for this security update

For home users, no-charge support is available by calling 1-866-PCSAFETY in the United States and Canada or by contacting your local Microsoft subsidiary. For more information about how to contact your local Microsoft subsidiary for support issues with security updates, visit the Microsoft International Support website: North American customers can also obtain instant access to unlimited no-charge email support or to unlimited individual chat support by visiting the following Microsoft website: For enterprise customers, support for security updates is available through your usual support contacts.

The fixit solution described in this section is not intended to be a replacement for any security update. We recommend that you always install the latest security updates. However, we offer this fixit solution as a workaround option for some scenarios.

For more information about this workaround, visit the following Microsoft security bulletin webpage: The bulletin provides more information about the workaround, including the following:

• The scenarios in which you might apply or disable the workaround.
• How to manually apply the workaround.

To apply this workaround automatically, click the Fix this problem link under the "Enable this fix" heading. Then, click Run in the File Download dialog box and follow the steps in the wizard.

To undo the fix and restore the original settings, click the Fix this problem link under the "Disable this fix" heading. Then, click Run in the File Download dialog box and follow the steps in the wizard.

Notes

• This wizard may be in English only. However, the automatic fix also works for other language versions of Windows.
• If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Windows XP and Windows Server 2003 file information

• The files that apply to a specific milestone (RTM, SPn) and service branch (QFE, GDR) are noted in the "SP requirement" and "Service branch" columns.
• GDR service branches contain only those fixes that are widely released to address widespread, critical issues. QFE service branches contain hotfixes in addition to widely released fixes.
• In addition to the files that are listed in these tables, this software update also installs an associated security catalog file (KBnumber.cat) that is signed with a Microsoft digital signature.

For all supported x86-based versions of Windows XP

For all supported x64-based versions of Windows Server 2003 and of Windows XP Professional x64 edition

For all supported x86-based versions of Windows Server 2003

For all supported IA-64-based versions of Windows Server 2003