Eddy,
The first article uses the conventional method for shutting down System restore.
The second method requires the use of both regedit and Group Policy Editor.
However the 1st sentence states the following:

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
Hopefully that was done.