Help

Hmm i was on my msn one day
(about 2 weeks ago) and than someone enter on my another msn...

i saw him bcause i have many msn and ia dd all they on wich one
b4 this I was posting looking at internet when my another msn come online
so i speak with him and it turn off, so about 1 minute after this my another msn got online and the same thing, and than my another msn ... (keep going) then a go to my msn and change all passwords.

Anyway i use combofix to try find a virus and it was empty, and anothers antivirus and again empty
...

so today i was choosing a music to put on windows media player and now
he got online again!

wht do u think it is ?

its me!