• Register
0 votes

Problem :

Downloaded the Xamarin Android Player and with a >>next>> progress installed Virtual Box.

But when I tried to start the emulator I got below error:

Failed to initialized device (name Of the emulator)
VboxManager Commendt Failed

And a detail of ta error in Oracle Vm Virtualbox is as below :

VT-x is disabled in the BIOS for both all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)

How can I fix above error?

7 5 2
3,870 points

Please log in or register to answer this question.

2 Answers

0 votes

Solution :

It is the RAM related issue. A documentation is self explanatory:

You want to allocate >3GB of RAM to a VM. This requires: the 64 bit host system; and a true hardware pass-through ie the VT-x.

Fast solution

Allocate less than the 3GB for a virtual machine.

Complete solution

  1. Make sure your system is the 64 bit.
  1. Enable the virtualisation in your host machine.


To run your Oracle VM Virtual Box / VMware machines on 64-bit host there is the need to enable a Virtualization Technology (VTx) and also Virtualization Technology Directed I/O (VTd).

Usually these setting are disabled on a level of BIOS.

So to enable VTx and VTd you need to change the corresponding settings in a BIOS.

Below is the example how to do it for a HP Compaq 8200 or similar PC:

  1. Start a machine.
  1. Press a F10 to enter BIOS.
  1. Go to Security-> System Security
  1. Next Enable Virtualization Technology (VTx) and also Virtualization Technology Directed I/O (VTd).
  1. Finally Save and restart your machine.
9 7 4
38,600 points
0 votes

This exception usually happens when the virtualization of your CPU is disabled in the Bios. The modern computer has technologies that can be used to accelerate virtualization.

Reason to enable:

There is no major reason to enable it unless the user has the plan to use the virtual machines.


In order to fix this issue, you will have to try one of the following methods

Enable Intel virtualization in the Bios:

The first solution is to check whether you have enabled virtualization in your Bios or not. This solution is required at the system level and has to access your Bios. Windows 10 and 8.1 require VT-x/AMD-V enabled the process to accelerate the usage of desktop virtualization software like VirtualBox and Hyper-V.


The process to enable this feature is different in every computer and it totally depends upon your computer interface.

  • I enable this by simply by the procedure;
  • Open Bios
  • Going to the bios tab
  • Enable Intel Virtualization Technology

Enable the physical address extension:

Another reason for this error that your Physical Address Extension is disabled. This can be solved by;

  • Get access to settings of your Virtual Machine through VirtualBox.
  • Go to System.
  • Click on the Processor tab
  • Here check the Enable PAE/NX checkbox in the extended features.
11 5 2
3,890 points

Related questions

1 vote
1 answer 68 views
Problem: I have fundamental knowledge about Android. If I try to run my emulator then I always see below error: "Intel HAXM is required to run this avd /dev/KVM is not found. Enable VT-x in your BIOS security setting, ensure that your Linux distro has working KVM ... it referring to Linux distro in my above error message as I am currently running the windows 7 on my HAXM and the VT supported PC?
asked Jun 2, 2020 Martin K 6.6k points
0 votes
2 answers 809 views
Problem : While I was trying to add the virtual device in my Android Studio, Android Studio is Showing me the following Error. Enable vt-x in your bios security settings (refer to documentation for your computer). Please let me know if anybody has any solution on above error message.
asked Dec 4, 2019 alecxe 7.5k points
0 votes
1 answer 87 views
Problem : Intel i5-2410M CPU is running at 2.30 GHz running the Windows 7 64-bit operating system. I have the VirtualBox 4.13 installed. I am trying to run the ubuntu-14.04-desktop-amd64.iso but I face the below error This kernel requires an x86-64 cpu but only detected ... that tried to use my image again but I still face the same error. Is there any other reason why I am unable to use the image?
asked Jan 14, 2020 jwilliam 3.9k points
0 votes
1 answer 91 views
Problem : Facing the AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED) error message while trying to start the virtual machine using my VM VirtualBox. I am facing this issue on my Windows 7 machine.
asked Jan 14, 2020 jwilliam 3.9k points
0 votes
2 answers 388 views
Problem : Currently I am facing following issue: Failed to open a session for the virtual machine ubuntu. Raw-mode is unavailable courtesy of Hyper-V. (VERR_SUPDRV_NO_RAW_MODE_HYPER_V_ROOT). Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
asked Dec 10, 2019 alecxe 7.5k points
1 vote
2 answers 655 views
Problem : I am using the VirtualBox with OS X as host and CentOS on a guest VM. In OS X I created the folder myfolder, added it as a shared folder to a VM, turned on a VM, in CentOS created folder as /home/user/myfolder and typing as below : sudo ... /user/myfolder But have below output: /sbin/mount.vboxsf: mounting failed with the error: No such device What am I doing wrong in above scenario?
asked Jan 22, 2020 jwilliam 3.9k points
0 votes
1 answer 682 views
Problem : I am new to laravel. I recently installed laravel homestead and it was running using the powershell. But now it has stopped working completely. I had suspended the vagrant and turned off my box. Now it is only showing me below error: ... (extended info not available) VBoxManage.exe: error: Context: "LockMachine(a->session, LockType_Write)" at line 493 of file VBoxManageModifyVM.cpp
asked Feb 24, 2020 mphil 2.3k points
1 vote
1 answer 44 views
Problem : I have very recently started earning PHP. Now I am facing below error if I try to run the script. Please find the error message as below for your reference. Warning: file_get_contents() [function.file-get-contents]: https:// wrapper is disabled in the server ... know this is the server related issue but still I am unaware of the steps those I need to take to fix above server error.
asked Apr 6, 2020 morrisBson 3.2k points
0 votes
1 answer 478 views
Problem : When I am trying to upload the csv file with zipcode it will convert and save the latitude and logitude. A error is occurring to convert a zipcode to lat,lng. In the localhost its working very fine. But when I am trying to upload it in the live server. I am ... the google api key also. I am unable to add php.ini file. If I try to upload php.ini file then it shows internal server error.
asked Jan 31, 2020 jwilliam 3.9k points
1 vote
1 answer 213 views
Problem : Looking for the solution on bellow problem setting the parent of a transform which resides in a prefab is disabled to prevent data corruption
asked Nov 8, 2019 peterlaw 6.9k points