Windows 10 back to Windows 8 / 8.1?

Hi, a long time ago I upgraded my computer from Windows 8.1 to 10.

But now I want to have Windows 8.1 on my computer again.

How can I reset the pc so that the old Windows version is on it again?

This was also pre-installed on the laptop.

When I do a factory reset, Windows 10 is still on it… What's that supposed to mean?

Not at all, unless you still have a full backup of the old OS. If it is a "prefabricated" PC, you could have a look at the CD's, there's often one with which you can install backward. But everything is lost one way or another.

The why is closed to me too - Win8 is dead, and will soon be out of support for good, there's nothing more, no bug fixes, nothing.

Where should Windows 8 come from if Windows 10 is installed?

In addition, support for Windows 8.1 will end in two years.

I would stick with W10.

I think the old operating system will be deleted when installing Win10.

Is there still a backup from the old OS?

When you upgraded to Win10, a complete copy of Win8.1 was placed on the disk and you had 30 days to downgrade again, after these 30 days no more

In other words: If you do not have a complete backup / ISO of your previous system, then you have to completely reinstall 8.1 including everything else that is / was on it