How to fix hyper-v cannot be installed a hypervisor is already running

Enable-WindowsOptionalFeature –Online -FeatureName Microsoft-Hyper-V –All -NoRestart

The above command installs only the hypervisor but does not install the administration tools, if you want to manage the Hyper-V within the virtual machine you must install RSAT for Hyper-V to do this run the following command:

Install-WindowsFeature RSAT-Hyper-V-Tools -IncludeAllSubFeature

you want to create a cluster then you need to install the Cluster service, run:
Install-WindowsFeature RSAT-Clustering -IncludeAllSubFeature

you can install Multipath I/O to enable multiple paths to the storage, if this is your case follow:
Install-WindowsFeature Multipath-IO

Restart to finalize the virtual machine with the command:
Restart-Computer

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[Vor_Tex_Sun]

Amazing. Worked for me, I can now finish my lab studies :) Thanks pal

[spyrosdelta]

These commands work 100%, Thank you a lot !!!!

[mohammedalademi]

I suffered a lot to solve it, Now finally it works ... Thnxxx

[ultramonchoman]

Thank you it works perfect, by the way I just played the video like 20 times just because the music XD

[joaomonteiro]

I was trying nested virtualization but when I tried to activate Hyper-V I was getting this error.
When I selected the Add Rules to Roles option, the Hyper-V square was blank, but if I tried to activate it, I received the error.
Your tip worked perfectly
Thank you for your help.

[sopheakpanha]

This is the most amazing tutorial ever. Thank you so much

[peterthepan]

Thanks. I tried this on Virtualbox and it works well.

[SportHubu]

Thanks a lot mate..I was struggling whole day

[Abdul-nvft]

Thanks for Sharing, ...Excellent Video

[michaelricks]

Thanks very much for that it works perfectly. I have been trying to work this out for a week now. I was thinking I could only do it with the VMWare 6.0 Web Client which would mean purchasing VCenter

[markabrahams]

Im getting Hyper-v Errors also, cant start any Virtual machine. what are the steps to undo the installation via powershell, sure there must be another method of install Hyper-v

[pgrajeev]

Thanks.. It works, I'm able to install HyperV inside another HyperV vm.

[paulsiddall]

Thank you /so/ much! Your solution really helped me out! - Thanks!

[jabadhossain]

thank you so much very fantastic and easy concept

[terdseterdse]

Great Video It was a great help Thanks

[infofun]

Thank you for sharing your knowledge with us :)

[mohammadomar]

Perfect you saved my time, you are the best thanks a Mil :)

[sadakuknoor]

Hi, Bro, I am getting error Hyper v

Failed to start the Virtual machine because one of the hyper v components is not running.

Thanks