Evo sta pise na Google:
http://www.tech-faq.com/cmos-checksum-bad-error.shtml
What Causes CMOS Checksum Bad Errors?
There are usually three main reasons that a CMOS Checksum Bad Error has occurred. They include:
* CMOS Battery not functioning properly
* Your BIOS has been updated (either by you or possibly a virus)
* The computer was shut down improperly (e.g. shutting off the computer's power without first shutting down the computer (MS Windows requires you to shut down your computer before shutting off the power).
Ima jos nekih varijacija odgovora, a ovo je bio prvi po redu odgovor.
Na svetu postoje samo 2 OS-a: 1. Mint, 2. svi ostali!