Reset Windows PC without knowing the account from the previous owner?

I got a Windows laptop for free. Unfortunately, the previous owner is still logged in and I have no way to get the password from the previous owner to change the account. My question: How can I change my account or even reset the PC to factory settings so that I can log in?

Share the disk (Disk Management) and pack it on the empty part of Ubuntu (Linux).

Boot with an installation DVD and format the hard drive. Then you can reinstall Windows. This also ensures that no "leftovers" are left over from the previous owner.

At Win 8 or 10:

In the login screen, press the switch-off logo, then hold down the Shift / Shift key and select Restart.

Then select Reset to factory settings (or similar, details, if relevant).

basically:

Boot medium (eg DVD or USB stick) to reinstall Windows.

But wanted to use lt. Question even Windows.

Then select Reset to Factory Defaults (or similar, details below, if relevant). "

Note:

There under troubleshooting.