A premium virtualization standard (now free for personal use) known for excellent performance, robust snapshot management, and stable driver emulation.
Each student runs Windows Server 2008 in VMware Player or VirtualBox on their individual PC. This works well if student computers meet the hardware requirements and you can distribute ISO images or pre-built VMs ahead of time. Windows Server 2008 Simulator
Free, open-source, and incredibly lightweight. It runs flawlessly on older and newer host machines. A premium virtualization standard (now free for personal