去掉虚拟机可怕的报警声

最近开发时经常听音乐，虚机也常开着。但是虚机里面的警告提示音很刺耳。网上搜了一下，竟然在TECHNET看到了一篇文章

 里面有解决此问题的原文：

To stop a virtual machine from generating a beep sound when an operating system event occurs, follow these steps:

1. On the virtual machine, click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate, and then click the following registry subkey:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Beep
3. In the right pane, right-click Start, and then click Modify.
4. In the Value data box, type 4 to turn off the beep sound, and then click OK.

5. Quit Registry Editor, and then restart the virtual machine.

    按以上步骤将注册表后问题解决。