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en	Make sure that you have installed Tails using either:

en	[[Rufus from Windows|install/windows#rufus]]

en	[[balenaEtcher from macOS|install/mac#etcher]]

en	[[GNOME Disks from Linux|install/linux#install]]

en	[[the Linux command line|install/expert#install]]

en	Select the Start [[!img lib/start.png alt="" class="symbolic" link="no"]] button.

en	Press and hold the Shift key while you select the Power [[!img lib/system-shutdown.png alt="" class="symbolic" link="no"]] button and then Restart.

en	Windows shuts down and restarts on the Choose an option screen.

en	In the Choose an option screen, choose Use a device.

en	[[!img install/inc/screenshots/choose_an_option.png class="screenshot" alt=""]]

en	If the Choose an option screen or the Use a device option don't appear, refer to the [[instructions on starting Tails using the Boot Menu key|doc/first_steps/start/pc#boot-menu-key]].

en	In the Use a device screen, select USB HDD.

en	Windows shuts down and the computer restarts on your Tails USB stick.

en	In the future, we We recommend that you only plug in your Tails USB stick while Windows is shutting down. Otherwise, a virus in Windows could infect your Tails USB stick and break its security.

en	Such an attack is possible in theory but very unlikely in practice. We don't know of any virus capable of infecting Tails. See our [[warning on plugging Tails in untrusted systems|doc/about/warnings/computer#software]].

en	If the computer starts on Tails, the Boot Loader appears and Tails starts automatically after 4 seconds.

en	[[!img install/inc/screenshots/grub.png class="screenshot" alt="Black screen ('GNU GRUB') with Tails logo and 3 options: 'Tails' and 'Tails (Troubleshooting Mode)' and 'Tails (External Hard Disk)'."]]

en	The Troubleshooting Mode entry disables some features of the Linux kernel and might work better on some computers. You can try this option if you think you are experiencing hardware compatibility errors while starting Tails.

en	The External Hard Disk entry makes it possible to [[start from an external hard disk|doc/advanced_topics/external_hard_disk]] and some [[problematic USB sticks|support/known_issues#problematic-usb-stick]].