This page offers detailed information about Microsoft's June 2015 Patch Day. The company releases security patches for its Windows operating system as well as other company products on the second Tuesday of each month.
The guide provides you with information about each security bulletin that Microsoft released on June 9, 2015 that include affected products, severity information as well as links to the bulletins to look up further information.
I addition to that, you find an executive summary in the beginning listing the most important changes, information about the operating system and Microsoft product distribution, new or revised security advisory information, a list of non-security updates the company released since the last patch day and information on how to download the patches to devices.
Operating System Distribution
Windows Vista and Windows 7 are two client operating systems that are affected the most this month. Both share the same bulletin severity while Windows 8x and newer versions are not affected by MS15-057, a vulnerability affecting Windows Media Player.
The situation is different on the server side. Windows Server 2008 and 2008 R2 are affected by most vulnerabilities including one that received the severity rating of critical.
Other Microsoft Products
Security Advisories and updates
Non-security related updates
How to download and install the June 2015 security updates
Patches are distributed via Microsoft's automatic update system to home users worldwide. While that covers most home users, some may have blocked automatic updates from being deployed on their systems, for instance to run tests first or wait for stability reports before patches are applied.
If you have configured automatic updates, you may still want to run a check right away so that the updates can be downloaded and installed on a system running Windows right away. If you don't do that, you may wait hours before the patches are picked up automatically.
The best method to run update checks is the following:
Alternatives are provided for users who don't use automatic updates. Updates are made available on Microsoft's Download Center from where they can be downloaded. Another alternative is the monthly security ISO image that Microsoft releases.
Last but not least, third-party software is also provided to download updates and patches to systems. These third-party solutions may improve the user experience, for instance by allowing you to download patches for multiple versions of Windows from a single machine in one go.
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