A fundamental security precept is “patch up all machines before brining into production.” This advice applies to VMs and hosts, and is included in the Planning for Hyper-V Security content in the Hyper-V Planning and Deployment Guide.
OK, so how are you supposed to know what updates apply? For Hyper-V, you can bookmark http://technet.microsoft.com/en-us/library/dd430893.aspx. This page has the cumulative updates list for Hyper-V.
Using the Community Content feature of this page (and most MSDN/TN pages) we can also list for you the updates you may need for Windows, VMM, VPC and VSC.
Click the “Annotations” RSS Feed button to subscribe (this feed is for ALL annotations, not just annotations to the Hyper-V update list).
You asked, we listened. One URL to bookmark where you can find the current list of patches.
We’d love to hear your feedback on this, leave comments here.