Aaeon MB-562 Manual page 100

LOAD BIOS DEFAULTS loads the default system values directly from
ROM. The BIOS Defaults provide the most stable settings, though
they do not provide optimal performance. LOAD SETUP DEFAULTS,
on the other hand, provide for maximum system performance. If the
stored record created by the Setup program becomes corrupted (and
therefore unusable), BIOS defaults will load automatically when you
turn on the mainboard .
Load BIOS defaults screen
92 MB-562 User's Manual