title: How do I establish a COM port on virtual machine that points at the USB port of the host desktop?
body: <p>I am using Hyper-V Manager on my Windows 8.1 device to host a virtual machine. As it turns out, there is no way to enable your COM ports through the user interface, instead you must use Windows PowerShell (<a href="http://blogs.technet.com/b/jhoward/archive/2013/10/31/hyper-v-generation-2-virtual-machines-part-5.aspx" rel="nofollow noreferrer">as described here</a> and shown below).</p>
  
  <p><img src="https://i.stack.imgur.com/LXe87.jpg" alt="enter image description here"></p>
  
  <p>I have followed the directions provided in the link above, and I can see the VM COM ports (1 &amp; 2) listed in the device manager of the VM. I can point at the VM COM ports with the kernel debugger in WinDbg (running on the VM). Finally, I am trying to kernel debug a peripheral device physically plugged into the USB port of the <strong>HOST</strong> machine (COM4).</p>
  
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  <p>How do I map the <strong>VM</strong> COM ports to the <strong>HOST</strong> machine?</p>