VirtualBox 6.1 运行win7卡死 卡顿

VMMDev: vmmDevHeartbeatFlatlinedTimer: Guest seems to be unresponsive. Last heartbeat received 5 seconds ago

日志显示如上

主要是因为“声音->启动声音->控制芯片”选择了“Intel HD 音频”，系统默认了，将芯片选择“ICH AC97”即可。

https://www.mmdowns.com/virtualbox-slow.html