alt + F11 at boot time - lets you burn recovery disks (it copies your hard disk to CDs)
alt + F10 will restore the hard disk from the recovery CDs
I don't know if there are other options on the eRecovery screen (the one you get with the F11 option)
If you never burned the initial set of disks when the computer was new you may not have a recovery option other than ordering a set of recovery disks from Acer.
