In some examples, an indication that a virtual machine is to begin a boot process is received. In response to the received indication and prior to beginning the boot process, the virtual machine is migrated from a first host to a secured host, where the secured host includes a security mechanism to provide security that is unavailable at the first host. In response to the migrating, the boot process of the virtual machine is initiated at the secured host. The virtual machine is migrated from the secured host to a host other than the secured host in response to determining that the boot process of the virtual machine at the secured host is complete.