I know you've got one already but just seeing this now & I just wanted to second W4R's suggestion of Trend Micro pc-cillin
they have 30 day free trials. I do have a slightly different version than whats listed here and I love it!
Avoid biting when a simple growl will do
The Spirit Lives As Long As Someone Who Lives Remembers You - Navaho Saying
Vindication ~ For all those pets who became sick or lost their lives from tainted pet food