Be aware that starting April 14th only SharePoint 2013 farms with SP1 are supported.
SharePoint 2013 servers/farms without SP1 are no longer supported and hotfixes released beginning with April 2015 cannot be installed on SharePoint 2013 servers without SP1.
See here for details:
https://support.microsoft.com/en-us/lifecycle?p1=16652...(read more)![]()
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