BAD!! I really recommend you getting Microsoft Security Esentials. It gets the job done and its FREE!! (and its from microsoft so you can trust it) Click the link below to find out more...
Another awesome protector is Avast Free edition...Dont just take my word for it, look at the website listed below...it gives all the specifications on what it has. Including:
anti rootkit,
real-time scanning (AND DOESNT HOG UP MEMORY)
File System / Mail Shield
Web Shield
IM / P2P Shield
Network Shield,
etc!!!
