do you have a firewall...anti virus..and/or anti trojan program?it looks like some university student tried to hack into your computers through some kind of trojan..however could be a virus too..why don't you just scan your computer for viruses using an up to date anti virus..and later with some anti trojan?if you don't have an anti virus that is up to date then you could scan your computer online..there are many free online scans available.If you want an anti trojan then check out this website out:
http://www.lockdown2000.com/
i haven't tried any of their software but i heard somewhere that its good.