There's a lot of sites with links to downlaod antivirus and antispyware.
It's the antivirus Kaspersky, you can download and choose trial version, for 30 days of free antivirus service.
http://baixaki.ig.com.br/download/Kaspe ... -Virus.htm The site is brazilian cuz I 'm brazilian too, just click on the green icon.
You can use antispyware too, (deleted the link I posted before because the antispyware is bad)