Acer Altos R920 User Manual - Page 117

99 BIOS overview The Aptio Setup Utility is a hardware configuration program built into the system's Basic Input/Output System (BIOS). Since most systems are already properly configured and optimized, there is no need to run this utility. You will need to run this utility under the following conditions. • When changing the system configuration settings • When redefining the communication ports to prevent any conflicts • When changing the password or making other changes to the security settings • When a configuration error is detected by the system and you are prompted ("Run Setup" message) to make changes to the BIOS setup Note: If you repeatedly receive Run Setup messages, the battery may be bad. In this case, the system cannot retain configuration values in CMOS. Ask a qualified technician for assistance. BIOS setup loads the configuration values in a battery-backed nonvolatile memory called CMOS RAM. This memory area is not part of the system RAM which allows configuration data to be retained when power is turned off. Before you run BIOS setup, make sure that you have saved all open files. The system reboots immediately after you close the Setup. Note: Aptio Setup Utility will be simply referred to as "BIOS setup", "Setup", "System BIOS" or "Setup Utility" in this guide. The screenshots used in this guide display default system values. These values may not be the same as those found in the system.