This security update resolves the following vulnerabilities in Windows:
- MS17-004 Security Update for Local Security Authority Subsystem Service (3216771)
- The security fixes that are listed in the "Summary" section of this Security Monthly Quality Rollup 3212646 are also included in January 2017 Security Only Quality Update 3212642 . Installing either update installs the security fixes that are listed here. This Security Monthly Quality Rollup also includes improvements and fixes from previous monthly rollups.
- If you use update management processes other than Windows Update and you automatically approve all Security updates classifications for deployment, both Security Only Quality Update 3212642 and Security Monthly Quality Rollup 3212646 are deployed. We recommend that you review your update deployment rules to make sure that the desired updates are deployed.
- If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
How to obtain and install the update
Method 1: Windows Update
This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see Windows Update FAQ.
Method 2: Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.