A user reports that a desktop computer displays the incorrect time whenever the machine is booted. After replacing the CMOS battery, what else must you do?

After replacing the CMOS battery, it is essential to reset the system time in both the BIOS and the operating system because the correct time settings must be established in both places for the system to function correctly. The CMOS battery powers the BIOS settings, including the real-time clock, and replacing it typically resolves issues related to keeping time. However, after doing so, the time settings may still be incorrect or set to a default value, which needs to be updated.

When you access the BIOS setup utility, you can manually set the correct time and date. Similarly, if the operating system has not been updated with these new settings, it will continue to display incorrect time information. Therefore, both the BIOS and the OS need to be synchronized to ensure the computer operates correctly regarding timekeeping.

The other options involve more extensive changes or repairs that are unnecessary unless other hardware issues are present. For instance, replacing the system board or updating the BIOS might be appropriate only if there are additional symptoms indicative of motherboard failure or BIOS corruption. Flashing the system BIOS can be a solution to certain specific issues but is not typically necessary just for a time-setting problem. Reinstalling the operating system is also a drastic measure that would not address the immediate time issue effectively. Hence,