How do I reboot my computer?

Hold down the power button until it turns off, then click it again to restart it?

reboot? just turn it off or CTRL-ALT-Del and restart
or
do you want to reformat or restore your pc? repost if that's what you need and we'll walk you thru it

Turn it off then turn it back on !

go to start, press restart then your good to go! unlss you have a mac. then idk