Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: What happened to this company?

I've been using Norton products since the old 286 days, but the past few releases haven't been pretty. Doesn't matter how much memory I add, my PC, which should run like the hare, crawls along like the tortoise.5 days after installing Norton 360, my computer got infected with the trojan.zonebac virus. Norton says it removed it, but I am still getting porn ads in place of Google Adsense ads. So today I contacted support. Their answer for me was to pay them $90 to have their tech professional remove it. Silly me, I thought Norton was supposed to stop it from infecting my pc in the first place.I should have paid more attention to the reviews here.