Usually, you boot your computer from its main hard drive, which contains your operating system (like Windows). But occasionally, you may need to boot from a CD, DVD, or USB drive—say, if you’re running a recovery program, or testing out a new operating system like Linux.
In order to do this, you need to tell your computer’s BIOS to load the operating system from a different place than usual. You can do this in two ways: By changing the boot order in the BIOS or UEFI firmware (so it attempts to boot from CD or USB every time), or by accessing a boot menu on startup (so it’ll only boot from CD or USB that one time). We’ll show you both methods in this guide. The first is permanent until you change it again, but should exist on every computer. The latter method is faster, but may not exist on every machine.
NOTE: This process will look different on each computer. The instructions here will guide you through the process, but the screenshots won’t look exactly the same.
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