VirtualBox is a free, open source virtualization program from Oracle for the x86/x86_64 architectures.

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VirtualBox - VT-x is being used by another hypervisor

OS: Windows 7 x64 VirtualBox: 4.3.14 & 4.3.15 CPU: i5-3570 Motherboard: Gigabyte GA-H77M-D3H I receive the error below when I try to run a virtual machine with Enable VT-x/AMD-V on. With this ...
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votes
3answers
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RDP into VirtualBox on Windows

My co-worker has an old Mac, and needs to test something on Windows. His Mac is not powerful enough to run a VM, so he needs the ones I have. I have a few VMs that fit his needs. The solution I ...
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3answers
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VirtualBox 4.1.20 (Windows 7 / Ubuntu 12.04 (64 bit)) copy/paste is broken

I can't make copy/paste between Windows and Virtual Ubuntu 12.04 to work with this configuration: Host: Windows 7 Professional with VirtualBox 4.1.20 Virt: Ubuntu 12.04 (64 bit) with all ...
8
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3answers
6k views

How to install Windows 8 Developer Preview on VirtualBox in Ubuntu?

I have downloaded the Windows 8 developer preview ISO and I'm trying to get it running on VirtualBox 4.1 in Ubuntu 11.04 64-bit. Short story: it doesn't work. I see a message "Loading files..." ...
8
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2answers
20k views

Does QEMU's performance (still) lag VirtualBox's and is there a way to improve it without the hardware support+kvm kernel module?

I've noticed several articles that have claimed that QEMU is slower than VirtualBox (without hardware assistance) but several are years old, and the newest seemed to be from last year. Is it true ...
8
votes
4answers
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How to switch between virtual machines that are in fullscreen mode?

I recently switched from VMware Workstation to VirtualBox. VMware allowed me to switch between virtual machines in fullscreen mode by pressing a button in the toolbar. Since I'm often using two or ...
8
votes
3answers
14k views

Sync Iphone in Windows XP running as Virtualbox guest under Ubuntu 9.10

I run (K)Ubuntu 9.10 as my main operating system, but I still have a valid XP license, so I've been running Windows XP as a guest operating system with Virtualbox 3.10. I cannot get Itunes (running ...
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2answers
7k views

Can't set manual IP to Virtualbox Host Only adapter in CentOS 6.5

When I configure the IP address of VirtualBox 4.3.2 (running on Windows 8.1) host only adapter, it changes it back to some other IP. Guest OS is CentOS 6.5. I tried to set the IP in network ...
8
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3answers
769 views

Is it possible to setup host machine browser as default guest system browser

So I want to be redirected to my host system browser when I click some link in guest system. Note that I don't want to have browser on guest system at all. Host: Windows 7 Guest: GNU/Linux & ...
8
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2answers
4k views

dual monitor linux guest in virtualbox

I read that the newer VirtualBox supports Linux guests with dual monitors. I'm able to get two monitors to start when I start my Arch VM, but I cannot get Xorg to span to the 2nd monitor. They ...
8
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1answer
5k views

Slow speed with shared folders in VirtualBox

I'm using VirtualBox 3 on my Ubuntu 9.04 desktop, and I've got a VM with Windows XP sp3 mapping my ~/Documents folder as a shared folder. The virtualised Windows is mapping My Documents to the shared ...
8
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2answers
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Is there any performance difference between the VMDK and VDI virtual disk formats with Virtual Box?

In virtual box 3.0.2 is there any performance difference between using the native VDI virtual disk format and the VMDK virtual disk format?
8
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2answers
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How to decrease the CPU usage when running Virtual Box?

I am facing an issue with 100% CPU usage under my system when running VirtualBox. Here are some further details: My System Information: CPU 1 name: Intel(R) Pentium(R) Dual CPU T2310 @ ...
8
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2answers
4k views

How to copy VirtualBox VDI contents to a partition and dual boot the OS from it?

I'm a Linux user but I keep a compressed Windows XP ISO with me on a pen drive for the case I absolutely need Windows to do something. This works in VirtualBox most of the time. But now I want to ...
8
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4answers
412 views

Difference between Mac and Windows Host for XP Guest in VirtualBox

Here's the setup: I have an older piece of remote monitoring equipment, known as a Badger. The GUI control software that runs on Windows is a Java app, the CD has a date of 2003 but I think the ...
8
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1answer
2k views

How to install OSX into VirtualBox on a Macbook Air using Apple's Reinstall USB

I'm currently dual-booting OSX and Ubuntu on my Macbook Air, but it'd be nice to run OSX within Ubuntu via VirtualBox. This seems possible using VirtualBox and is legal - there's even a post on an ...
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3answers
6k views

Can't install Windows 98 SE in virtualbox - SUWIN caused a General Protection Fault in module <unknown>

I get this error when installing Windows 98 Second Edition on virtualbox. my host is Mac OsX. the guest settings are the following: Base memory: 64 MB Boot Order: Floppy, Optical, Hard Disk ...
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3answers
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Windows Virtual Machines will not run

I'm trying to setup a few virtual machines to use for testing websites in the various old versions of IE. I had Microsoft Virtual PC working on an older machine using XP mode and 2 other VHD's from ...
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3answers
16k views

Connecting to VirtualBox guest (ubuntu) from host (osx) via NAT?

I have a VirtualBox guest (running Ubuntu) configured with NAT through my host laptop (running OSX). It was my understanding that with NAT configured, I could access the guest from the host (w/o any ...
7
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3answers
4k views

Closing GUI Session While Running Virtual Mashine - Virtual Box

How could we close GUI session in virtual box without shutting down the virtual machine. I have a lot of Linux instances I only need to connect to one of them.
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4answers
524 views

How to convert an existing Windows machine to VirtualBox? [duplicate]

I have VirtualBox installed on my Linux machine (Debian). I need to move a physical Windows 7 machine into my VirtualBox. How to convert a physical Windows OS to VirtualBox?
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3answers
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How to access my local server on my VirtualBox virtual machine?

Here's my setup: I have a local server running on my machine (Mac OS, Snow Leopard). I can access it via my browser by doing localhost:3000 I have a virtual machine using Virtual Box running a ...
7
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2answers
11k views

Virtualbox gives Error code: 0x000000C4 with Windows 8.1 or 2012

Trying to boot Windows 8.1 or Windows server 2012, either a previously installed VM or booting from CS/ISO on virtualbox gives Error code: 0x000000C4.
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2answers
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Can't find the right Ubuntu Server ISO for VirtualBox

I have been trying all morning to find the right Ubuntu Server (12.04) ISO to use for installing an Ubuntu guest OS on my VBox VM. Here are the relevant stats: Host Machine: AMD 64-bit Host OS: ...
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4answers
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Convert VirtualBox guest into main OS

Is it possible to somehow convert my guest OS to the Host OS? I have a PC and would like to physically install my current Ubuntu VM into my new notebook. Is it possible?
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5answers
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Visual Studio Development on Virtual Box, Boot Camp, or VMWare Fusion

I currently have a Mac, 2ghz and 2 gigs of ram, running OS X Leopard and Virtual Box with a Windows 7 Pro 32bit virtual machine. Performance on the virtual machine is fine for minor tasks but is very ...
7
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2answers
23k views

64-bit Windows guest in VirtualBox impossible without VT-x support?

I have successfully installed Windows Vista 32-bit in a VM with VirtualBox. Now I'm trying to do the same with Windows Vista 64-bit and it just isn't working. I have created the VM but it seems that ...
7
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2answers
10k views

VPN connection with VirtualBox

I am on a Windows PC running VirtualBox with Ubuntu installed. I have my networking setup as NAT. On my Windows PC, I am connected to a VPN, but I cannot access those VPN resources from VirtualBox (I ...
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3answers
5k views

Virtualbox - Install Guest Additions over again every time Linux kernel updates

I have Ubuntu running as a Virtualbox, and every time it upgrades the kernel, the Guest Additions stop working. The install process in Linux requires using a virtual CD, running scripts from the ...
7
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3answers
9k views

Virtualbox, merging snapshots and base disk

I have a virtual machine with about 30 snapshots in branches. The current development path is 22 snapshots plus the base disk. The amount of files is seemingly having an impact now on IO and the dev ...
7
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4answers
13k views

How to authenticate to a VM using Vagrant up?

Authentication failure during Vagrant Up, while vagrant ssh and ssh vagrant@localhost -p2222 works I would like to execute a shell script using Vagrant at boot. Vagrant is unable to Authenticate, ...
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4answers
910 views

Manual clone/recreate virtual disk

I am trying to clone a virtual disk image in a fairly manual fashion. The overview of my methodology so far is as follows: Create virtual machine in VirtualBox with 120GB HDD (hypervisor and HDD ...
7
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1answer
5k views

VirtualBox - reduce max-size of dynamic .vdi hard disk

I'm trying to reduce the maximum capacity of a .vdi file (hard disk) for one of my VMs. I set it as dynamically-allocated with a maximum capacity of 25GB. I want to reduce this to 10GB. NOTE: I do ...
7
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2answers
5k views

How to add a 'Host-only Adapter' to a VirtualBox machine via Vagrant file configuration?

A lot of answers out there are only applicable version 1 of Vagrant file configuration. e.g. config.vm.network :hostonly, :adapter => 2 The new public network does not support this feature. e.g. ...
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3answers
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E_FAIL (0x80004005) when running Linux through Windows 8 Virtualbox

I wanted to run Linux through my Winows 8.1 machine using VirtualBox as hypervisor. After I tried adding Ubuntu (or Fedora, on another instance) to the list of virtual machines, I clicked Start, but ...
7
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1answer
9k views

VirtualBox: Odd behaviour after updating the host to OS X Mavericks

I've just updated my Mac to OS X Mavericks. However, after doing so, I'm facing a couple of issues with my VirtualBox program including the following: 1 - The virtual machines (guest OSes) fail to ...
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2answers
7k views

How to correctly sync time in linux running as virtual guest after host resumes from hibernation?

I use multiple virtual boxes for development and correct time and date is important for me when I push git commits. I do not shut down my host - it runs for months without restarting. I only hibernate ...
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2answers
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exporting a virtualbox VDI to a harddrive to boot it natively

I have a VirtualBox 3.1.2 image of Debian 5.0.2 running on Windows XP SP3. I would like to export that Debian image to a USB harddrive such that I could boot to that drive and run it natively. Is that ...
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6answers
4k views

Ubuntu in Virtualbox - WEBrick web server very slow when using local IP address

I'm using Ubuntu (Lucid Lynx) to learn Ruby On Rails. I'm running Ubuntu in VirtualBox (the host is Windows 7 Ultimate), using bridged networking. When I run my Rails app and point the browser at it ...
7
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2answers
6k views

installing on a physical drive with virtualbox/Windows

How can I install a guest system on a physical drive/partition in virtualbox running on a Windows host ?
7
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2answers
9k views

Converting existing PC into a VM with Virtual Box

I'd like to convert my laptop (Windows Vista) into a VirtualBox VM. I think there is a utility for VMWare, but is it possible to do with Virtual Box? Also, do I need another (host) PC to run the ...
7
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3answers
4k views

How do I change the space I allocated to my virtual hard drive in VirtualBox?

I have a Windows 7 64-bit virtual machine running inside VirtualBox. When I first setup the system I gave the virtual hard drive 20GB of space to work with, but I also set it to dynamically expand (or ...
7
votes
4answers
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How much hard drive space should I give my Windows 7 Virtual Machine?

I'm going to reformat my computer today and install Linux Mint on it. I developer on a .NET stack mainly for work and home, but I hate using Windows (go figure). What specs do I need for Visual ...
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3answers
5k views

How to Switch Some Basic Keys in Windows (Windows VirtualBox Guest on OSX Host)

I am going crazy switching between Windows XP in a VirtualBox and the host (OSX), mostly due to the use of control-c, control-v, control-x and that they are different between the two OSes. Is there ...
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VirtualBox Fatal: no bootable medium found! System Halted

I just download and then tried to add new virtual machine. But it gives me an error. I couldn't find the solution. it seems that VM can not find the OS. I do not know how to resolve. Error is: Fatal: ...
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3answers
6k views

Virtualbox 3.0 is very slow, any way to fix it?

I upgraded to Virtualbox 3.0 and then 3.0.2. I use Vista as a host and Ubuntu as the guest. In Virtualbox 2.0 I was able to run Ubuntu with standard desktop effects. After upgrading I noticed that ...
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2answers
5k views

VirtualBox and SSD's TRIM command support

I am aware of the huge number of posts on the internet saying that this would not work and why and I really spent days looking for the solutions months ago but I've found yesterday some tips how to ...
7
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5answers
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How to get IP address assigned to VM running in background?

I run my Ubuntu instance out of Virtual Box in the background using the following command: VBoxManage startvm ${VM_NAME} --type headless The main difference between that and running it through the ...
7
votes
2answers
5k views

Ubuntu Linux server - set file permissions for VirtualBox shared folder

I have Ubuntu server with Apache 2, PHP, and various DBMSs running in VirtualBox on my Mac host for my web development work. To easily create/edit the files I'm working on, I mounted a directory from ...
7
votes
2answers
4k views

How to clone entire VirtualBox OS to a new PC (real-hardware)?

The situation is; I am running a web server (Ubuntu 10.10 server) on virtualbox v.4 inside Ubuntu 10.10 Desktop and now I want to clone entire web server on my brand new PC. Please help me with this, ...