The defrag in Windows will relocate files for reasonably efficient access - if you can get it to run to completion with that feature turned on, and leave it on for all subsequent defrags. One problem experienced by those who can't help messing with success is that if you turn off the "optimize" setting and defrag once without it, you're back to square one, since essentially you're doing a SafeMode (dumb) defrag without it, and will destroy the "efficient" locations that were set up.

Norton utilities are generally excellent, although the built in Windows tools will do just about everything that most people need. The real problem is that it's almost impossible to tell how much better the Norton stuff is when you need to justify spending the few extra bucks, and there are a very few isolated utilities that simply don't run well with Windows. The only utility I can think of offhand that would justify - cost/benefit - Norton would be the need for a secure disk wipe; but I don't handle classified stuff any more and my "personal data" is mostly appropriate to the (dark) humor columns.

SpinRite was an absolutely essential tool 30 years ago, but since Steve Gibson switched his interests to the hackers and spammers, I haven't seen any compelling justification for it on my current equipment. I'd probably buy it if HE told me again why I should; but I don't think he participates in the company much anymore.

It should be noted that Windows defrag is "interruptible." You can turn it on when you retire, and if it's still running when you need the machine, just shut it off. Restart it at the next convenient time, preferably when it can run for a few hours at a time. It's a little less "efficient" that way, but eventually it will get done, and subsequent defrags - if done regularly - will take a lot less time than those "worst case" examples.

John