Acer Altos G330 Series - Manual (Page 103)

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Pre-troubleshooting procedure
If you encounter any problem, ensure first that the system has the
latest BIOS version. In addition to the BIOS, also update any drivers
used for components that you have installed in the system, such as
video drivers, network drivers, and storage drivers.
Resetting the system
Before going through in-depth troubleshooting, attempt first to reset
the system using one of the methods below.
Perform Purpose To do this
Soft boot
reset To clear the system memory and reload
the operating system. Press Ctrl+Alt+Del
Cold boot
reset To clear the system memory, restart
POST, and reload the operating system.
This will halt power to all peripherals. Press the system
power button off
and then on.