Looking for Windows Server 2008 R2 Cluster and Hyper-V Hotfixes?

https://blogs.technet.microsoft.com/askcore/2013/02/15/looking-for-windows-server-2008-r2-cluster-and-hyper-v-hotfixes/

Hyper-V: Update List for Windows Server 2012

https://social.technet.microsoft.com/wiki/contents/articles/15576.hyper-v-update-list-for-windows-server-2012.aspx

Windows Server 2012 Failover Cluster: Hotfixes

https://social.technet.microsoft.com/wiki/contents/articles/15577.windows-server-2012-failover-cluster-hotfixes.aspx

Hyper-V: Update List for Windows Server 2012 R2

https://social.technet.microsoft.com/wiki/contents/articles/20885.hyper-v-update-list-for-windows-server-2012-r2.aspx

Recommended hotfixes and updates for Windows Server 2012 R2-based failover clusters

https://support.microsoft.com/en-gb/help/2920151/recommended-hotfixes-and-updates-for-windows-server-2012-r2-based-fail

[source: Microsoft]