oper syst:win xp media edition

Hi
I will be greatful if someone solve my problem
Some times when I am using Internet I open my windows task manager.
In here there are five tabs Applications, processes,performance,networking and Users.


I have the problem concerning users area.
Here are five items users,id,status and clientname.
What I want to ask is that sometimes under client name heading i find word "console" written. Other times the area under that heading is empty.
(user: myname is written, id:0,status:active, client name:" " or console).

Q:does the word "console" means someone someone else is illegaly accessing my computer or is it something else. i was worried because I dont use firewall(it slows my net speed) so i thought someone is illegaly accessing my pc
there are times when the space under heading client name is empty ie word "console" is not written there.

Thanks