The 'Full warning message' is that which appears after the computer is opened. It fill most of the screen so I cannot state exactly what it says.
When I push the F1 button, the message disappears and I can use the computer as normal.
I did copy one of the messages that I get (I get different messages when I restart the computer) which is as follows -
This BIOS - ACER only
Copyright - ACER
CPU: Intel (R) Core (TM) 2 Duo CPU
The MCH is operating with DDR3 1066
Warning: Your chassis has been opened.
Press F1 to continue.
The other message includes - Push Del for setup.
This did happen a few years ago but the warning message disappeared after a few days.
Procedure for Clearing Warning Message:Note: If LANScope is installed by the customer, LANScope will still record a chassis intrusion even when the feature is disabled.First, ensure that the top case or side panel (depending on model) is properly installed on the chassis. Once you have confirmed that the chassis is properly closed, follow the steps below:
If you wish to set the Chassis Intrusion Detect feature so it never generates a warning message when powered on, follow the instructions below:
There is no Chassis Intrusion Detect on my computer but there is an option to 'Reset Configuration Data' which, at the moment is set to 'No'. Should I set this to 'Yes' or would it affect other parts of the computer?
Yes I have an answer for you:
Resetting Chassis Opened Warning:
This is from the Acer website: