October 10th saw the end of security and quality update's for Build 1511. So if your currently using this build and would like to carry on receiving updates you'll need to update to a later version which you can do by either running Windows Update or using the Link Removed.
Ref...
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The Link Removed has been in public preview since November 2016. This month marked our first release when security update information was published entirely in the new format. Over the last few months, customers and partners have provided a lot of feedback on the direction and implementation of...
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