Microsoft Silverlight Support Lifecycle Policy

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Microsoft is announcing a support lifecycle policy today for the Microsoft Silverlight product.

In the past, Microsoft Silverlight was shipped out-of-band and did not take a Support Lifecycle typical of many Microsoft products. To clarify the Support Lifecycle situation for customers, Silverlight will be defined as a "Tool".

A "Tool" is defined as a utility or feature that aids in accomplishing a discrete task or a limited set of tasks. Major Tool versions receive a minimum of 12 months notification prior to the end of support. Otherwise, support ends contemporaneously with the product versions for which they are intended (for example, Microsoft Windows).

Note: Some Tools may receive security updates or feature enhancements. Customers may be required to install the latest update of the supported Tool’s major version to receive support.

Microsoft will continue to support Silverlight by shipping updates to the latest version of both Silverlight runtime and Silverlight SDK. Updates and new versions of the Silverlight runtime are backward compatible with web applications built in previous versions of Silverlight and will include the latest security enhancements, performance improvements, and product fixes.

For support Lifecycle information on a specific Silverlight version select one of the following:

Silverlight 1
Silverlight 2
Silverlight 3
Silverlight 4
Silverlight 5

Silverlight 1 and 2 – Silverlight 1 and Silverlight 2 were supported until October 12, 2010. Customers are strongly encouraged to upgrade their development environments to the latest version of Silverlight.

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Silverlight 3 – Silverlight 3 support ended April 12, 2011. Customers are strongly encouraged to upgrade their development environments to the latest version of Silverlight.

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Silverlight 4 – Silverlight 4 support ended January 8, 2013. Customers are strongly encouraged to upgrade their environments to the latest version of Silverlight.

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Silverlight 5 – Microsoft will provide assisted and unassisted no charge support for customers using versions of Silverlight 5. Paid support options are available to customers requiring support with issues beyond install and upgrade issues. Microsoft will continue to ship updates to the Silverlight 5 runtime or Silverlight 5 SDK for existing and newer browser versions given that their extensibility model supports plug-ins, including updates for security vulnerabilities as determined by the MSRC. Developers using the Silverlight 5 development tools and developing applications for Silverlight 5 can use paid assisted-support options to receive development support.

Silverlight 5 will support the browser versions listed on this page through 10/12/2021, or though the support lifecycle of the underlying browsers, whichever is shorter. As browsers evolve, the support page will be updated to reflect levels of compatibility with newer browser versions.

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Future announcements regarding the Support Lifecycle for Silverlight will be made available at http://support.microsoft.com/gp/lifecycle.

The Microsoft Support Lifecycle (MSL) policy provides transparent, predictable information regarding the support lifecycle of Microsoft products. More information is available on the MSL Web site http://support.microsoft.com/gp/lifecycle.

Last Review : April 29, 2014