What is VirtualBox & How to Install It
What is Virtualisation?
Before installing VirtualBox, let's understand the concept it's built on: virtualisation.
Virtualisation is a technology that lets you run multiple operating systems simultaneously on one physical machine. Each OS runs in an isolated environment called a Virtual Machine (VM), completely unaware it's sharing hardware with other systems.
Real-World Analogy
Imagine a single office building (your PC) with several self-contained apartments (VMs) inside. Each apartment has its own furniture, kitchen, and rules. Residents don't interfere with each other, but they all share the same building infrastructure (electricity, plumbing = CPU, RAM). That's virtualisation.
Physical Machine vs Virtual Machine
WITHOUT VIRTUALISATION WITH VIRTUALISATION
────────────────────────────── ────────────────────────────────────
┌────────────────────────────┐ ┌─────────────────────────────────┐
│ YOUR WINDOWS PC │ │ YOUR WINDOWS PC │
│ │ │ (HOST OS — runs normally) │
│ Windows 11 │ │ │
│ (uses all resources) │ │ ┌───────────┐ ┌───────────┐ │
│ │ │ │ Ubuntu │ │ Kali │ │
│ CPU: used by Windows │ │ │ (VM 1) │ │ (VM 2) │ │
│ RAM: used by Windows │ │ │ │ │ │ │
│ Disk: Windows only │ │ │ 2 CPU │ │ 1 CPU │ │
│ │ │ │ 4GB RAM │ │ 2GB RAM │ │
│ Can't run Linux │ │ │ 50GB Disk│ │ 30GB Disk│ │
└────────────────────────────┘ │ └───────────┘ └───────────┘ │
│ │
│ CPU: 8 cores shared │
│ RAM: 16GB shared │
│ Disk: partitioned per VM │
└─────────────────────────────────┘Why Use a Virtual Machine?
- 🛡️ Safe Sandbox — Anything you do inside the VM stays inside. Break it, delete it, restore it.
- 📚 Learning — Perfect for learning Linux without risking your main system.
- 🔬 Testing — Test software, configurations, or malware in isolation.
- 💼 Multiple OS — Run Ubuntu and Windows side-by-side on the same machine.
- 🔄 Snapshots — Take a "snapshot" of a VM state and restore it at any time, like a save-game in gaming.
- 🏢 Enterprise Use — Data centres run hundreds of VMs on one server to save cost.
VMs share your host computer's resources. If your PC has 8GB RAM and you give the VM 4GB, both your host and VM will have limited RAM available. Make sure your PC meets the recommended specs before creating VMs.
What is VirtualBox?
Oracle VirtualBox is a free, open-source Type 2 hypervisor that lets you create and run virtual machines on your existing OS (Windows, macOS, or Linux).
A hypervisor is the software that creates, manages, and runs virtual machines. There are two types:
PE 1 HYPERVISOR (Bare-Metal) TYPE 2 HYPERVISOR (Hosted)
──────────────────────────────── ────────────────────────────────
┌──────────────┬─────────────┐ ┌────────────────────────────┐
│ VM 1 │ VM 2 │ │ Applications │
│ (Windows) │ (Ubuntu) │ ├────────────────────────────┤
├──────────────┴─────────────┤ │ Virtual Machine (VM) │
│ HYPERVISOR │ │ ┌───────────────────┐ │
│ (VMware ESXi, Hyper-V, │ │ │ Guest OS │ │
│ Proxmox, Xen) │ │ │ (Ubuntu Linux)│ │
├────────────────────────────┤ │ └───────────────────┘ │
│ HARDWARE │ ├────────────────────────────┤
└────────────────────────────┘ │ VirtualBox / VMware │
Runs directly on hardware. │ Workstation / QEMU │
Used in data centres. ├────────────────────────────┤
Very fast and efficient. │ Host OS (Windows/macOS)│
├────────────────────────────┤
│ HARDWARE │
└────────────────────────────┘
Runs on top of existing OS.
Perfect for learning/dev use.
Why VirtualBox for Learning Linux?
- ✅ Completely Free — No cost, no trial limits
- ✅ Cross-Platform — Runs on Windows, macOS, and Linux
- ✅ Easy to Use — Clean GUI, beginner-friendly
- ✅ Snapshots — Save and restore VM states instantly
- ✅ Shared Folders — Easily transfer files between host and VM
- ✅ Active Community — Huge community, lots of documentation
- ✅ Supports Many OS — Ubuntu, Debian, Fedora, Kali, Windows, and more
VMware Workstation Pro is more feature-rich but was paid (recently made free). WSL2 (Windows Subsystem for Linux) gives you a Linux command line inside Windows, but no full GUI. VirtualBox gives you a complete, fully isolated Linux desktop — ideal for learning.
System Requirements
Before downloading, check that your machine meets these requirements:
| Component | Minimum | Recommended | Notes |
|---|---|---|---|
| CPU | Dual-core, 64-bit | Quad-core, 64-bit | Must support hardware virtualisation (Intel VT-x or AMD-V) |
| RAM | 8 GB | 8 GB or more | You'll give 2–4 GB to the VM, need the rest for host OS |
| Disk Space | 10 GB free | 50+ GB free | Ubuntu needs ~25 GB for a comfortable install |
| Host OS | Windows 10/11, macOS 11+, Linux | Windows 11 | 64-bit host required |
| VirtualBox Version | 7.x | 7.1 (latest) | Always use the latest stable release |
VirtualBox requires Intel VT-x or AMD-V to be enabled in your BIOS/UEFI. Most modern PCs have this enabled by default, but if VirtualBox gives an error about 64-bit guests not being supported, you need to enter your BIOS settings and enable "Virtualisation Technology" or "SVM Mode".
How to Check if Virtualisation is Enabled (Windows)
# Press Ctrl+Shift+Esc to open Task Manager
# Click "Performance" tab → CPU
# Look for "Virtualisation: Enabled" at the bottom rightHow to Download VirtualBox
Follow these steps to get the installer:
- Open your web browser and go to the official VirtualBox website: virtualbox.org
- Click the big blue "Download VirtualBox 7.x" button on the homepage
- Under "VirtualBox binaries", click "Windows hosts" (since we're installing on Windows)
- The installer file will download — it's named something like
VirtualBox-7.1.x-Win.exe(~115 MB)
Always download VirtualBox from virtualbox.org. Never use third-party download sites — they may bundle adware or outdated versions. The URL should start with https://www.virtualbox.org.
Also Download the Extension Pack
On the same downloads page, download the VirtualBox Extension Pack. It adds important features like:
- USB 2.0 / 3.0 device support
- VirtualBox Remote Desktop Protocol (VRDP)
- Disk image encryption
- NVMe controller support
The Extension Pack version must exactly match your VirtualBox version. If you install VirtualBox 7.1.4, download Extension Pack 7.1.4.
Installing VirtualBox on Windows (Step-by-Step)
Step 1 — Run the Installer
Double-click the downloaded .exe file. If a User Account Control (UAC) popup appears asking "Do you want to allow this app to make changes?", click Yes.
VirtualBox installs kernel-level drivers (for networking and USB virtualisation) that require administrator privileges. This is normal and expected.
Step 2 — Welcome Screen
The VirtualBox Setup Wizard will open. You'll see a welcome message. Click Next.
Step 3 — Custom Setup (Components)
You'll see a component selection screen. Keep all defaults selected:
- VirtualBox Application — the main program ✅
- VirtualBox USB Support — lets VMs access USB devices ✅
- VirtualBox Networking — virtual network adapters ✅
- VirtualBox Python Support — optional, for scripting ✅
You can change the install path if needed (default: C:\Program Files\Oracle\VirtualBox\). Click Next.
Step 4 — Network Interface Warning
You'll see a warning: "Installing the Oracle VM VirtualBox Networking feature will reset your network connection and temporarily disconnect you from the network."
This will briefly disconnect your internet. If you have anything downloading or active video calls running, pause or save them before clicking Yes. The disconnection lasts only a few seconds.
Click Yes to proceed.
Step 5 — Missing Python Dependencies (Optional)
If you don't have Python or win32api installed, VirtualBox may warn about missing Python Core / win32api. This is fine to skip — it only affects the VirtualBox Python scripting interface, which you won't need as a beginner. Click Yes to proceed anyway.
Step 6 — Ready to Install
A summary screen shows what will be installed. Click Install to begin.
The installation takes about 1–3 minutes. You may see multiple "Windows Security" popups asking you to install device drivers:
- "Oracle Corporation Network Service" → Click Install
- "Oracle Corporation Universal Serial Bus" → Click Install
- "Oracle Corporation Storage" → Click Install
VirtualBox creates virtual hardware — virtual network cards, virtual USB controllers, virtual storage adapters. Each requires its own Windows driver. These are safe, signed Oracle Corporation drivers.
Step 7 — Finish
Once installation completes, you'll see a "Installation was successful" screen with a checkbox: "Start Oracle VirtualBox after installation". Leave it checked and click Finish.
Troubleshooting Common Installation Issues
| Problem | Cause | Fix |
|---|---|---|
| Error: VT-x is disabled in BIOS | Hardware virtualisation is off | Restart PC → enter BIOS (F2/Del) → enable "Intel VT-x" or "AMD-V" |
| 64-bit OS not available in VM creation | VT-x not enabled or Hyper-V conflict | Enable VT-x in BIOS AND/OR disable Hyper-V in Windows features |
| Installer says "requires Visual C++ Redistributable" | Missing runtime libraries | Download and install Microsoft Visual C++ 2019 Redistributable |
| Network not working after install | Network drivers resetting | Wait 30 seconds — Windows re-acquires the connection automatically |
| Black screen when starting VM | Display driver issue | In VM Settings → Display → increase Video Memory to 128 MB |
Hyper-V Conflict
If you use WSL2, Docker Desktop, or Windows Sandbox, they require Hyper-V which can conflict with VirtualBox. In VirtualBox 7.x, this conflict is mostly resolved. If you experience issues, go to Windows Features → uncheck "Virtual Machine Platform" and "Windows Hypervisor Platform", then restart.
Quick Recap
- Virtualisation lets you run multiple OS on one machine in isolated environments
- VirtualBox is a free, Type 2 hypervisor — perfect for learning and development
- You need at least 8 GB RAM and hardware virtualisation (VT-x/AMD-V) enabled
- Download only from virtualbox.org — install Extension Pack too
- Allow all driver installs during setup — they are safe, signed Oracle drivers
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