troubleshooting Question

Warning CPU has changed or CPU ratio changed fail

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rutlandictFlag for United Kingdom of Great Britain and Northern Ireland asked on
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Warning! CPU has changed or CPU ratio changed fail.

I am getting this message each time i start the PC, i have looked through previous questions posed by other users and have found some soultions.  Unfortunately the thing that is puzzling me at the moment is that i cannot save and exit BIOS, when i press Y and hit enter nothing happens, if i press it a few more times it starts bleeping and i have to reset the computer to exit BIOS.  I have reset BIOS and moved the CMOS jumpers to clear and back but it has made no difference.  
Have i taken the correct procedure to rectify this problem? if not does anyone have any other ideas on how to repair this and to what might be causing it?


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