If Windows 8 or 10 is <span class="linux upgrade-linux">also</span> installed on the computer, you can refer instead to the [[instructions on starting Tails from Windows 8 or 10|doc/first_steps/start/pc#windows-restart]].Starting Tails from Windows is easier than using the Boot Menu key.
If the computer starts on another operating system or returns an error message, shut down the computer again and repeat step 3 for all the possible Boot Menu keys identified in step 2.