Resetting the Computer
You may have to reset (reboot) your computer on some occasions when an
error occurs and the program you are using hangs up.
If the computer operation seems to hang up, first wait. It is possible that the
computer is processing data. Periodically check the hard disk drive in-use
indicator, if it flashes irregularly, the program may be accessing data and
preventing you from using the keyboard. If you are sure the operation has
stopped and you cannot use the “restart” function of the operating system,
reset the computer.
Reset the computer by any one of these methods:
Press
Ctrl+Alt+Del
on your built-in keyboard.
If the above action does not work, turn off the computer with the power
button. Wait for at least five seconds and turn it on again.