I think it's more a case of Windows 7 doing it for you. There's nothing wrong with defragging a Windows 7 hard drive; it's just that you will likely find it doesn't need it when you check, because it's been working behind the scenes.

Now, special case from experience: if you replace a mechanical boot hard drive with an SSD, then you MUST turn off defragging of that SSD. Windows is not going to recognize the switch and do it for you. It only sets it up correctly for a new build.


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