Don't use. Use restart instead, and be clear that restart in this context refers to the device, not to a program or an app.
Example
After Setup is complete, restart your computer.
If the UI or API uses reboot in a label or an element name, it's OK to refer to the label or element name, but use restart to describe the action or event that occurs.
Example
The Reboot method shuts down the device and then restarts it.