Acer Altos G530 Series - Manual (Page 133)

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Resetting the system
Before going through in-depth troubleshooting, attempt first to
perform reset the system using one of the methods below.
To do this Press
Soft boot reset to clear the system memory and reload the
operating system. Ctrl+Alt+Del
Cold boot reset. Turn the system power off and then on.
This clears system memory, restarts POST, reloads the
operating system and halts power to all peripherals. Power off/on