Error Message:
Warning! CPU has been changed or CPU ratio change failed. Please re-enter CPU settings in the CMOS setup and remember to save before you quit.

Translation:
A new subscriber reports that his computer recently began acting strangely. It locks up during shutdown and presents an error message during bootup, but the reader doesn’t understand why these things are happening.

Solution:
A developer who creates an error message that instructs users to edit the CMOS (complementary metal-oxide semiconductor) setup without providing full instructions on how they should accomplish this task is rather irresponsible. Fortunately, we can recommend some general troubleshooting maneuvers that may be successful.

First, we advise the reader to try restoring the BIOS (Basic Input/Output System) settings to their default configuration (because the CMOS setup is integrated within the BIOS setup). He can access the BIOS settings by following the on-screen instructions (such as Press ESC To Access Setup or F1 = Setup), which displays as soon as he boots the PC. From the Setup utility, the reader should look for and activate an option that restores the BIOS default settings, save the changes, and exit the Setup. This may work if the problem was caused by a modification of the BIOS or motherboard configuration.

Assuming the reader didn’t modify the system’s BIOS settings or motherboard configuration, however, we believe the error has occurred for some other reason. We cannot say with certainty what that reason is, though. It could be a corrupt BIOS, a malfunctioning hardware component (most likely a memory module, the CMOS battery, or the system fan), or a power supply that is struggling to keep up with a recent hardware upgrade. Resolving the situation—either by replacing the relevant motherboard hardware, upgrading the power supply, or obtaining a BIOS update from the motherboard manufacturer—demands a general familiarity with the internal workings of a PC and the technical skills to manipulate the motherboard. We encourage the reader to review the documentation that came with his PC and request assistance from the computer manufacturer. He also should determine whether the computer remains under warranty because if it is, this manufacturer may be able to resolve this problem for free.

http://www.smartcomputing.com/techsupport/detail.aspx?guid=&ErrorID=33001