Just a tip what I would do if I was you.
Download utorrent (can be found through a google search)
Once thats downloaded and running on ur comp, go back to google and type in, btjunkie, the search for Norton 2010. Is best anti-virus software avaliable, alternativley, you could choose to spend just under £30 and purchase it online, fully ligitimate copy, off a well known website, another tip, if you have 2 other mates who are willing to share the cost of the disc with you, works out at roughly £7 each, and is able to be installed on upto 3 computers. Let me know what you think of my post please as feedback is highly grateful.
Good luck with removing the virus.