Well, that's how it is supposed to work. However, it has been my experience that every once in awhile, it is necessary to do a complete manual defrag at boot. NU 16 has also asked me to do a manual defrag on up to three of my drives at one time. I did not turn off auto-defrag, but the program evidentially found some reason for me to run defrag manually on those three drives. This request has occured about 3 times; sometimes on only C: Drive, sometimes on 2 drives.
Even if the program does not ask me to run a manual defrag, over time the auto-defrag just doesn't keep up. I can analyze a drive after a couple of weeks, and the block chart has no green blocks for directories or files on it. This would, I think, indicate that the drive was no longer in its best defrag condition. So I run a manual at boot. .
It would be great to defrag all drives during one single re-boot as we used to be able to do in previous versions of NU. Why has Norton taken away a good option that worked great? I would like to have this feature back. Is that possible?
Note, NU 16 is, in my opinion a big step backward. The UI is difficult to discern and on the dashboard, the indicator will not go over 50%. I will run every function manually and still it shows I'm only 50% optimized. I'm looking for another utility program - that is unless Norton gets this version to work as well as version 15 did. Come on, admit it, version 16 is full of bugs.