Microsoft has verified that it is a problem in Windows XP. Sony does not have any information on this issue yet (as of March 22, 2002). However, since it does not cause any damage to the operating system, please continue using the computer, without deleting the folder.
For more information, please refer to the following solution in Microsoft's technical support website.
Article ID: Q312131
Last Modified: January 25, 2002
Title: The Owner Account is displayed as Account Unknown in Profiles on Windows XP Home Edition-Based Computer