That's odd - could you reinstall it (Speedfan)

reinstalled and no difference

Ok - still odd 0 degrees & bad checksums

So Go:

Start - Run - (type) sfc /scannow (with the space)(Enter)

sfc = System File Checker restores files to their correct state.

This may require you to put in your XP CD.

Done what elpmek said and it would seem the crashing issues have gone away thank you elpmek. But the speedfan problem is still the same.

Should i worry about it?

Sorry about delay. don't worry about speedfan.

If everything else okay i'll marked this fixed.

Thank you very much for all your help.