title: Can not start android emulator - Hyper V detected but Hypervisor platform is not available
body: <p>I am running into an issue where I can't start the xamarin android emulator, it says:</p>
  <pre><code>Device error: WARNING | unexpected '-prop' value ('monodroid.avdname=pie_9_0_-_api_28'), only 'qemu.' properties are supported
  WARNING | unexpected '-prop' value ('emu.uuid=c23d7e88-c1e4-4283-bb2b-e2632b5c3c16'), only 'qemu.' properties are supported
  ERROR   | x86 emulation currently requires hardware acceleration!
  CPU acceleration status: Hyper-V detected and Windows Hypervisor Platform is not available. Please either disable Hyper-V or upgrade to Windows 10 1803 or later. To disable Hyper-V, start a command prompt as Administrator, run 'bcdedit /set hypervisorlaunchtype off', reboot. If u
  More info on configuring VM acceleration on Windows:
  https://developer.android.com/studio/run/emulator-acceleration#vm-windows
  General information on acceleration: https://developer.android.com/studio/run/emulator-acceleration.
  </code></pre>
  <p>I <em>need</em> Hyper-V to be enabled for the emulator acceleration, otherwise if i disable it, the apps on the emulator run painfully slowly. The thing is I had hyper-v enabled before, and all of my emulators ran just fine with it, then suddenly I started getting this error. Both Hyper-V and Windows Hypervisor Platform are enabled in windows features. I also have HAXM accelerator installed for the android. I also tried running the following commands: bcdedit /set hypervisorlaunchtype auto and dism /online /enable-feature /feature-name:Microsoft-Hyper-V -All; both commands resulted in &quot;operation completed successfully&quot;. I also tried running &quot;C:\Program Files (x86)\Android\android-sdk\emulator\emulator-check.exe&quot; accel, and this is what I got:</p>
  <pre><code>accel:
  0
  Please disable Hyper-V before using the Android Emulator.  Start a command prompt as Administrator, run 'bcdedit /set hypervisorlaunchtype off', reboot.WHPX (10.0.19042) is installed and usable.
  accel
  </code></pre>
  <p>I am not sure what is going on, and why my emulators suddenly can not run with Hyper-V enabled. Has anyone faced this issue before? Any help would be much appreciated. Thanks</p>