Why does defragmentation not work, data is always performed and then zero? Can you hang your laptop often?
Is there an "old" disk (HDD) inside that you can hear? Or an SSD that is silent?
You hear what he is doing in the background
In https://www.giga.de/...-so-gehts/
From about the middle it is described how the disk can also be checked with chkdsk. If you try this, what is the result?
A defragmentation can mainly With older hard disks (and anyway with the first defragmentation) this takes a long time.
Just because the percentage display is stuck doesn't mean the program has hung. Possibly. Is it really that slow?
If after a day it's still at zero percent, then I would worry.
This is not 1defragmentation; he did not continue after 1 day
With Win10 the defragmentation takes place in the basic setting, ie: if you have not changed it, automatically - and weekly in the background.
Then the current status: "OK (0% fragmented)" is displayed. - What more do you want?
Have windows 7