求救:reflag linux 6.0 启动问题

我用VIRTUAL-PC5.3安装REDFLAG6.0,启动后在经过了那个RED FLAG 6的启动动画后就长时间出现一个黑屏和一个不会动的下划线提示符 "_ ",过一会虚拟PC 提示:

Virtual Machine Additions is not installed on this virtual machine.

Virtual Machine Additions provide enhanced performance and integration features on guest operating systems. These features include pointer integration, folder sharing and time synchronization. To install Virtual Machine Additions select Install or Update Virtual Machine Additions from the Action menu.

我使用了虚拟PC 的菜单: "Insert or Update virtual machine addition right " 也没有作用
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