Hi,There are two way using anti virus.Choice a free edition or using a better one.for the first you can find three anti virus on the network now.AVG,Bitdefender and Pc tools.Pc tools is better than others.But if you want keep your laptop well,use a Strong anti virus.
Like Norton,McAfee,Trend or Kaspersky.
For the firest way, you can find them by searching in the internet.
Or find me in Yahoo360.They are in my Blog.
By this address. email@example.com
My suggestion is using Trend 2008,because if you have access to download a file by 85 MB,tell me send you a product key to activation that.
It's mine ,for three times using.I used one, if also you use that ,remain is one for me.just please don't give it to others.
You can find it by searching trend in internet.
Also it's better useing a software for managing your download.like (orbot) you can see that in www.download.com
or in my blog.it's free too.
Because of don't loosing you downloaded in disconnection.
Ok ! Thankx.