every time I've started "Analyse - FFT", I have got this error "Input procedure file does not exist or does not have delete access". I' ve installed Origin 6.0 + Patch - Client Setup on C:.
This is a network client bug that was in Origin 6.0 SR2 and SR3 I think. It is fixed in Origin 6.0 SR4. Apply this latest patch and you should be all set.