Just looked it up and your system does seem to have the F11 option (if it works is a different matter)
Info here:-
http://support.gateway.com/s/Manuals...ps/8510406.pdf To restore system software from the hard drive backup copy:
1
Restart the computer, then press F11 when prompted to start the
restore process. The System Recovery program starts. You have
three seconds to press F11 before Windows starts.
2
Click a system restore option. For more information, see
“Restoration options” on page 5.
■
Non-Destructive System Restore (Recommended)
■
Full System Restore (Destructive)
■
Full System Restore (with Backup) (Advanced Option)
3
Follow the on-screen instructions to complete the system
software restoration process.