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Yes, Virtual Machines (VMs) can be moved from one server to another, and even from one brand of hypervisor to another, for instance from a VM on VMware to a VM on Hyper-V. This can be done either for management reasons, to balance out loads or because a different administrator needs to run the VM, or for failover reasons – to ensure that a critical guest OS continues to function even if one physical server crashes. These functions may require additional software, either additional modules from the hypervisor vendor or aftermarket software from additional vendors.