How to restore XP to factory settings (i.e. delete the entire operating history of the OS) without reinstalling?

Question

Windows

How to restore XP to factory settings (i.e. delete the entire operating history of the OS) without reinstalling?
It is required to delete all system files created since the operating system.

Answer 1

Sysprep - will reset all settings. But the installed software will remain.

Answer 2

Repair the registry:
from %windir%\repair\
to %windir%\system32\config\
You can find a description of each file on the net.
For example: system - these are drivers, you can look for the rest yourself.