Automatically defragment

Yes, it does so automatically, at least for HDDs. I believe the default setting is once a week. SSDs get Trimmed, not defrag'd. I don't know what the default are for those.

I manually defrag once in a while. It's useful after applying ntfs compression to a file as that generates a lot of fragmentation. Can't say I've noticed much change in performance though, so defraging is probably not that important. Back in the days of DOS/Win3.1 it made a big difference, much less so now.

lx07 said:

SSD are optimized weekly and defragmented monthly by default.

You don't need to change any such settings unless perhaps you run your disk at 95% full. Even then it probably is not required.

In that case my is running late

@CountMike,

The automatic defrag task [\Microsoft\Windows\Defrag\ScheduledDefrag - Conditions] relies on AC power & on idle time.

Denis

Try3 said:

@CountMike,

The automatic defrag task [\Microsoft\Windows\Defrag\ScheduledDefrag - Conditions] relies on AC power [it also used to rely on idle time but that condition has been removed].

Denis

This is desktop computer, on 24/7.

Don't SSDs use a feature called Trim instead of the conventional Defrag application?

Mike,

I'm very sorry, I meant to add a second para. Since the disks are SSDs, the Days since last run entry can be misleading. See the explanation under the heading Scheduled task in defrag - MSDocs.

Denis

Berton said:

Don't SSDs use a feature called Trim instead of the conventional Defrag application?

The 'conventional Defrag application' is called 'Defragment and Optimize Drives' on the Start menu. It uses the appropriate method, defrag or trim, according to the type of drive it is optimizing.