Epson EL 486UC - Manual (Page 26)

Starting the SETUP Program
You can run SETUP whenever you see the operating system
command prompt, such as:
C:\>
or
A:\>
To start SETUP, hold down Ctrl and Alt, then press S.
Also, whenever you start your computer, if the system detects
an error in your system configuration, you will see the
following message:
Press the Fl key to continue, F2 to run the
s e t u p u t i l i t y
If you see this message, press F2 to run the SETUP program to
correct your configuration.
The table below lists the keys you can use to perform SETUP
operations.
1-10 Setting Up Your System