Nessus Output
It appears KB3123479 has not been installed since the following registry key does not exist and/or does not contain any of the following values : HKEY_LOCAL_MACHINE\Software\Microsoft\Cryptography\OID\EncodingType 0\CertDllCreateCertificateChainEngine\Config\default WeakSha1ThirdPartyFlags WeakSha1ThirdPartyAfterTime
2016-11-09
Probably a false positive on Windows 10 with the anniversary update installed.
Opened up a case with Tenable support, currently under review.
2016-12-01
Modified plugin resolved this issue.