eL_PuSHeR,
Thank you for your input. I have switched off the Defraggler option regarding the relocation of large files.
I do have a number of programs running in the background, e.g., Personal Firewall, Anti Virus and Windows Security Essentials - these are first to come come to mind.
But I still wonder why Windows Defragmenter seems to be more thorough - or is it just my imagination?
Regards,
currajong