Well if u ever come across a virus on ur pc but is still able to go on the internet for a short period of time u came to the right place. If u dont have money to play for getting an anti-virus u can always get a 90 trial of one of the most affective anti-virus known on the internet. its called Nortonh and u have two options between a old one and a new one (both work the same way just a different look) the website is posted below:
http://buy-static.norton.com/prod/html/partner/msft_EN.html
http://buy-static.norton.com/prod/html/partner/msft_EN.html