I have been using Hyper-V for 6 months now and its working great. One issue I am having is that , seemingly randomly , it starts several machines that are in a saved state and leaves them running until I shut them off. It causes major issues because I have 100+ Virtual machines each assigned with 4GB of ram in a system with only 64GB. This is a RDweb setup with only 10 users who only use 1 machine at a time so it is never an issue.
I cannot seem to find any info on why this is happening. My best guess would be that the machine is undergoing some sort of maintenance.