I have a old computer that has a core 2 duo in it .it hasent run for a while but when i turn it on the cpu under clocked it self from 2.13ghz to 800 mhz ? is that normal ?
Completely normal. It's simply running slower to save power.
however If it's doing that under a load then you have issues.
I am running on load
Do you have any power saving settings on in windows?
no i dont .