Having complete faith in CCleaner I decided to give Defraggler a go.
Choosing the normal Defrag option on 640GB data drive using less than 100GB, the program has been running 5 hours & counting, & is only 50% of the way complete.
System specs are not the problem, as my comp is plenty fast to run a defragging program.
What disappoints me the most is that when running a search, old forum threads show this issue had been raised by multiple people back in 2009, we are now in 2014 & the problem has STILL not been rectified? Very poor.
There are also a few "regulars" or developers on here that refuse to recognise there is an actual problem.