virtualbox 安装增强功能报错

 点击「设备」-「安装增强功能」，然后就弹出下面这个东西

Unable to insert the virtual optical disk C
C:\Program\Orade\VirtualBox\VBoxGuestAdditions.iso into the machine lubuntu1810.
Could not mount the media/drive 'D:\Program\Orade\VirtualBox\VBoxGuestAdditions.iso' (VERR_PDM_MEDIA_LOCKED).

Result Code: E_FAIL (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
Callee: IMachine {5047460a-265d-4538-b23e-ddba5fb84976}

直接运行提示权限不够，和系统版本有关系。