Warning on Hyper-V hosts under SCVMM

I have seen this documented in a couple of places now – but I also see a number of people still wondering why this is happening and how to stop it, so I thought I would post it here too.  When you first add a Hyper-V host to SCVMM 2008 you may see a warning icon displayed with the message “Needs Attention” and “Virtualization service version status is not up-to-date”.  To get rid of this alert there are three updates that need to be applied to the Hyper-V server:

Once you have these three updates installed everything should come up green.