If you shut your computer all the way down to where you have to press the start button to turn it back on, then that is a shut down.
To reboot/restart: If one goes to START button there are usually 3 options, (Stand by, Restart, turn off) if one clicks re start, it restarts the system without doing a full shut down.
Another option on is to
HIT- CTRL, ALT & DELETE at the same time, that is referred to as a soft reboot.
Except in windows XP on doing the ctrl, alt & delete when the window pops up, go to the top where it says SHUT DOWN and you click on re start.
Hope that helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *accept* button!