My XP machine is running very slowly.
New motherboard,RAM and HDD have now been fitted with the original CPU (which benchmarks OK). Some improvement, but it is still slow.
The new HDD was cloned from the old one.
There were previous issues with a SATA cable and a RAM module causing slow running and blue screens, These now check out OK.
I have run the usual cleaners and spyware accessories to no avail.

The post "Read me first before requesting help" has been followed and the result logs are in the following posts.

Much obliged for any assistance.