I recently built a new PC and found that Hyper-V hit memory and cache performance hard when installed. Screenshots were taken @ idle. No virtual machines running or created. Basically Hyper-V installed, restarted, benchmarked. Virtualbox does not seem to have the same problem. Before Hyper-V and without virtualization enabled in the bios. With Hyper-V installed and virtualization enabled. Hyper-V uninstalled and virtualization enabled. I've always run Virtualbox on my personal home computer but run Hyper-V at work for production. Thought I'd try standardizing and run Hyper-V at home. Not sure if this is expected but I sure didn't. Virtualbox installed and virt. enabled.