How to boot a computer from a USB drive
A bootable USB drive lets a computer start from the USB instead of its own disk. It is how you try or install an operating system, or run a rescue tool. These are the usual steps. Exact keys and menus differ between computer makers, so check your computer's manual if something does not match.
Before you start
- Back up anything important. Installing an operating system can erase a disk.
- Plug the USB drive straight into the computer, not into a hub.
- Keep a laptop on charge.
Step by step
- Insert the USB drive and restart the computer.
- As it starts, press the boot menu key. It is often Esc, F2, F10, F12 or Del, and many computers show a hint on the first screen.
- Choose the USB drive in the boot menu. You may see it listed twice, once with a UEFI label. Newer computers usually work best with the UEFI entry.
- Wait for the system to load. Many Linux USB drives start in a live mode first, so you can try the system before installing anything.
If the USB drive does not appear
- Try another USB port, ideally one directly on the computer.
- Look in the BIOS or UEFI settings for a boot order option and move USB up.
- Some computers have Secure Boot turned on, which can block some systems. Whether it matters depends on the operating system, so check that system's documentation before changing it.
Looking for a USB drive to boot from? Start with Ubuntu, Linux Mint or browse all categories. Each one is bought on eBay.