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Booting up is a procedure the computer undergoes immediately after you turn it on or restart it. During the boot, your computer loads the operating system, communicates with all of the installed devices, and gets ready to run. You may hear beeps and see numbers and words on the screen while your computer is booting. This is normal.

Cold and Warm Boots

Every time you flip your computer's power switch to ON, you perform a cold boot. This happens when you turn your computer on first thing in the morning or while you're using your computer and, for whatever reason, turn it off then turn it back on again.

A warm boot is when you restart your computer without using the power switch. To execute a warm boot, press the Ctrl+Alt+Delete keys.

Why Reboot?

Sometimes, your computer locks up while you're using it and/or may stop responding to your input. If that happens, you should reboot your computer with either a cold or a warm boot; usually, the problem clears up when the computer restarts.

Many times you have to reboot your computer when you're installing new software or hardware on your computer or when you make a change to its configuration. Usually in these cases, the system prompts you to restart your computer.