help with virus spreading through msn messanger

[hack2600]

hi,
i was wondering if anyone could help me or give me some advice?

i have seemed to have downloaded a virus from a mate through msn messanger, its was a rar file but the title of the file was something like "best new years crew pic ever" and there are also different names for the same file as well,

the bad thing about it is that it now sends the same file to all my contacts in my messanger list without me knowing so now most of my friends and family have the same problem as me

i have un-installed msn and re installed it and it doesnt seem to work i have also scanned my comp with avg and it found a trojhan horse virus but the problem is still occuring, i have also downloded spy bot and that is currerntly scanning as i type this but if the problem still persist i dont know what to do


anyone got any ideas?

would be most greatful for them

thanks!

PS: i have also done a system restore back a week because some computer bloke said at work that might fix the problem?

PPS:spyboy has found a virus called "NURECH" anyone know anything about that virus