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I've seen this error several times. Each time I google deeply and finally made me reinstall my windows and all stuffs. Please help, I don't want to reinstall everything again. The error is:

Windows Phone Emulator

Unable to start the Windows Phone Emulator

Windows Phone Emulator is unable to start because 
the hypervisor is not running. The likely cause is
that hardware-assisted virtualization is not enabled.

Check your computer's BIOS to ensure that hardware-
assisted virtualization and hardware-assisted data 
execution features are enabled.

Unable to start the Windows Phone Emulator

But yesterday I debugged really normally on Windows Phone using Emulator and I really sure
I've turned on Virtualization in BIOS and also in Turn Windows features on or off : Turned on all

Sometimes when I hit f5 the IDE come with another error: 0x80131500 enter image description here

My PC: windows 8.1 ultimate 64b, 4gb ram, i3, Visual Studio 2013 RC3

truongnm
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3 Answers3

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Finally after struggling all day, I solved it ^^ I post the solution here so that somebody don't have to waste time just like me to solve such a silly error!

  1. Just simple disable Hyper-V option in Turn Windows features on or off (you could open this by hit the combination Windows + S, this will open the search box, then type "Turn Windows features on or off"
  2. restart your PC
  3. enable the Hyper-V option by using the same way as step 1.

Enjoy coding :D

truongnm
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  • This works like charm - thank you very much, you saved me lots of nerves after I was searching for a solution the whole morning :) – user3079834 Dec 19 '14 at 16:20
  • This is indeed the only working solution. Thanks for trying it first! Its a shame such info is nowhere to be found in MSFT own support forums. – philk Mar 31 '15 at 01:16
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    Thanks! Although that should've been my first try... it's a Windows environment after all lol – eestein Jun 30 '15 at 13:44
  • You are genius! Thanks a lot! – Dmitriy Dec 07 '15 at 06:23
  • Thanks a lot. With the best wishes. – Farshid Saberi Apr 28 '16 at 16:00
  • Hasn't worked for me. After following exact steps and restarting, I got 2 errors (1) "You do not have permissions to modify internal Hyper-V network adapter settings, which are required to run the emulator" [Retry/Close]. Hitting retry stareted the emulator but then immediatelly error (2) "An OpenGL error has occured: Failed to read remote PID!. The emulator will shut down." – pixel Oct 17 '16 at 18:09
5

If the accepted answer doesn't work for you - as it unfortunately did not for me - also be sure to enable Data Execution Prevention (DEP) in your BIOS.

The article below outlines what BIOS settings to enable for Hyper-V: https://msdn.microsoft.com/en-us/library/windows/apps/jj863509%28v=vs.105%29.aspx

In my case, I had hardware-assisted virtualization enabled in the BIOS, but not data execution prevention (DEP). I also had Hyper-V enabled via Windows Features. After enabling DEP in the BIOS, I was able to run the Windows phone emulator.

Adam Weber
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4

CMD with admin rights:

bcdedit /set hypervisorlaunchtype auto

and reboot.

user3586834
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