This BIOS version might break 7840HS & 8845HS devices. Do not update if your device’s serial number is earlier than B7D-241101-000. (The S/N indicates the assembly date in the YYMMDD format.) Customers with 7840HS & 8845HS devices with earlier S/Ns can update to this version:
MD5SUM: df3bb67ac36ec9a88303fa599df03693 All 7840U & 8840U cpus are safe to update.