Users of the Internet Explorer (IE) browser should update to the newest edition for their operating system — in most cases, that means IE11 — even if they’ve discarded the browser for a rival, Microsoft said.

On Tuesday, Microsoft served up the final security updates for most users of editions prior to IE11, making good on a pledge that it would pull the patch plug on its older browsers.

In August 2014, Microsoft abruptly announced that support for IE9 would continue after Jan. 12, 2016, only for those running Windows Vista and Windows Server 2008, and for IE10 only on Windows Server 2012. Everyone else had to be on IE11 or Windows 10’s Edge to continue to receive security updates and technical support.

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