How to install Ubuntu step by step
A complete step-by-step guide to installing Ubuntu, from the installation USB to your first boot.
Installing Ubuntu is easier than it looks, and you don't need to erase Windows to try it: you can install it alongside Windows (dual boot) or on a dedicated machine. This guide covers the whole process.
Before you start: you'll need a USB drive of at least 8 GB with the installer already on it. If you don't have one yet, follow our guide on creating a bootable USB first.
1. Boot from the USB
Restart the computer with the USB plugged in and enter the boot menu
(usually by pressing F12, F10 or Esc
right after powering on, depending on the manufacturer). Select the USB
drive from the list.
2. Choose "Try Ubuntu" or "Install Ubuntu"
You can try the system without installing anything first, which is a good way to check that your hardware (Wi-Fi, graphics, sound) works well before committing.
3. Choose the installation type
Warning: if you're installing Ubuntu alongside Windows, choose "Install Ubuntu alongside Windows Boot Manager", NOT "Erase disk and install Ubuntu" — that second option deletes everything on the drive.
Typical installer options:
-> Install Ubuntu alongside Windows Boot Manager (dual boot, recommended)
-> Erase disk and install Ubuntu (deletes everything on the drive)
-> Something else (for manual partitioning)
4. Set up your user, language and time zone
The installer will ask for your name, computer name, a username and a password. Pick a password you'll remember well: you'll need it to install software and make important changes later.
Tip: tick the option to install updates and third-party software during setup (graphics drivers, media codecs) to save yourself extra steps afterwards.
5. Wait, then restart
Installation takes 15 to 30 minutes depending on your machine. When it's done, remove the USB when prompted and restart. If you installed alongside Windows, you'll see a menu to choose which system to boot each time you turn the PC on.
Note: if the dual-boot menu doesn't show up, see our guide on fixing GRUB.
Frequently asked questions
Can I install Ubuntu without losing Windows?
Yes — choose "Install Ubuntu alongside Windows Boot Manager" during setup. The installer resizes the existing partition automatically without deleting your files.
How much space does Ubuntu need?
25 GB is the recommended minimum, though for comfortable everyday use with room for programs and files, it's better to leave at least 60-80 GB.
What if my computer won't boot from the USB?
Enter the BIOS/UEFI (usually with Del or F2 at power-on) and check that Secure Boot is disabled, or that the USB drive has boot priority.