Acer G530 Series manual Resetting the system, To do this Press

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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	Ctrl+Alt+Del
operating system.
Cold boot reset. Turn the system power off and then on.	Power off/on
This clears system memory, restarts POST, reloads the
operating system and halts power to all peripherals.