what does"account unknown"in user profiles mean?

  blackmischief 23:07 07 Jan 04

Click start,click performance and maintenance,
click system,click advanced tab,click settings in the user profiles area.

When I do this the top line says "account unknown"
above my two entries.
What does this mean? Is this me and I just cant remember or is it someone or something else?

  recap 10:40 08 Jan 04

click here it may help?

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