<human>: Provide a brief overview of the text.

I studied computer science, I've always liked computers and during my college years I worked at a local pc repair place that was cheaper and a bit more reliable than the place at the mall. Naturally, all my friends/family in the area come to me with PC problems.

My mom died about a year after I was born and 4 years later my half brother was born to a woman my bio dad had begun dating, they got married about 3 years later. Me : 24, half brother: 19, dads marriage with step-mom/mom: 16 years. 

My brother generally keeps to himself, we have an okay relationship, he's introverted, a few good friends but he's not attending a million parties a month. Anyway his laptop was giving trouble recently so he asked me to fix it.

I took it to my place for a few days, lots of viruses and what else do I find while attempting to fix the disease ridden machine. LOTS OF INCEST THEMED PORN AND STORIES. I felt like throwing up because upon a closer look at some titles etc, they're all about sisters. I feel violated/repulsed. I gave him back his laptop and told him the cost of a new one, that this one was too far gone. 

I have no idea how to even look at him right now, I'm always at my parents but just knowing he's there makes me feel sick and not feel to go to my own home. Reddit what do I do? I feel like he's violated me in some way or another and I've gone from really loving the guy to feeling massively freaked out.
<bot>: IT girl fixing her half brothers laptop, found tons of viruses and sister themed incest porn videos/stories. I feel sick/creeped out, what to do?