First of all throw out your shitty antivirus program which sees bullshit around every corner.
Go check upon
>>>/tech/ for that.
Second, if you're still paranoid about torrenting, then only torrent at first with trusted sources.
Here I go with the spoonfeeding say Ahhhh~:
http://sukebei.nyaa.se/?cats=7_27&filter=2Everything that's Green is a trusted source according to Nyaa staff. You definitely won't find everything coming out of dllsite through that way though, that I can assure you off. But it's at least something.
Just my 2 cents on the matter.