How do you get your (old) laptop back on the road?

Processor Intel (R) Celeron (R) CPU N2930 @ 1.83GHz 1.83 GHz

Installed RAM 8.00 GB (7.89 GB usable)

System type 64-bit operating system, x64-based processor

Install Windows 8.1 or 10 completely fresh

Well, basically you have a rather bad processor first, which is the main reason for your slow laptop. But an SSD could be useful!
Otherwise also consider buying a new laptop.

Reinstall Windows.

Or you take a Linux distribution.
You can get even more performance out of that.

You can build in an SSD and set up Windows again. At the same time, maybe dust the thing off.
But that's about it.

Reset the laptop to the "factory settings" or set it up again.