Windows Update KB4015552 (April 2017)

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Active Member
Aug 12, 2014
Dorset, England, UK

In my Action Center, I am being offered KB4015552 described as 'Optional' and 'April, 2017 Preview of Monthly Quality Rollup for Windows 7'. I understand that the previews are released on the third Tuesday of each month but will become part of the following month's Patch Tuesday update. This is the first time I have noticed a preview update being offered on my system so I am a little confused as to what is best for me to do.

Is there any advantage in me downloading and installing this review version or would it be better to wait until the next Patch Tuesday offerings? I would welcome advice and comments.