Hyper-V Virtual Switch Causing 20% Usage Of CPU For System Interrupts

Every time I create a virtual switch in Hyper-V it causes a 20% increase in CPU from System Interrupts. I know it is the virtual switch because I have tried it a few times now and every time I create the new virtual switch then I get the above problem.

I have windows 10 pro, which is kept updated on a regular basis. I just follow the normal (default) steps to create the virtual switch:

  1. click on virtual switch manager, create virtual switch(external)
  2. add a name to the virtual switch
  3. External network checked with my laptops Qualcomm Atheros AR9485WB-EG Wireless Network Adapter, Allow management operating system to share this network adapter, checked.
  4. Then I click apply.
  5. Then in the virtual machine I go to settings and make sure it is using this virtual switch.

I would be extremely grateful if someone would be so kind as to help me figure out how to resolve the problem of this causing  a 20% increase in CPU from System Interrupts.

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