Bios changes re new chip?

Hi
Hope this is easy. My CPU 'fried' as the heat sink fan died. It was an AMD Athon 1000. The motherboard is KT7A raid, Windows 2000 professional, service pack 4.
I bought a new heat sink ( socket 462) and a reclaimed cpu from ebay which is a Duron 1100. It all works, but on start it says " CPU unworkable or new chip". :-oso BIOS needs changing. How do I go about this please?
The computer works fine if I just bypass this at start up. But clearly something else needs changing.
Cheers

 

See if a BIOS update is available @ Abits' site stating your issue in the changelog, otherwise I'd just leave it as it works. I'm a firm proponent of 'If it ain't broke...'.

 

Thanks for that, but I did meddle!
I went to soft BIOS and amended speed to 1100 from 1000.
It seemed ok.
Sadly, I then downloaded Advanced Systems stuff ( professional) and ran it to clear rubbish from the PC.
This morning, disaster. The PC works but it is though I had installed a new OS!
None of my programs, or files,are visible. It is like a new set up, all old stuff wiped.
I do not know what went wrong. But I suppose that is an issue for the software forum?
But the hardware works, it boots and comes up with a front page.:cry