Malware, spyware, computer virus' in general really annoy me too. Fortunately to this point my inconvenience has been limited to that and not a more serious or costly invasion of my privacy. What I'm curious about is, who makes this sh!t? A$$hats indeed.
Its seems like most manufacturers have issues with lemons here and there. Personally, I had a Gateway from 1994 that I drove into the ground for over 10 years without and issue. After that I had a Dell laptop that was an absolute PITA, POS. That said, our IT guys at work seem to just love them. I currently run a MacBook from 2007 that is starting to slow but has worked really well and no issues AFAIK with malware or virus. I also have an HP laptop that is a little over a year old that I primarily use for GIS applications and minimal web exposure and its been good so far. Macs tend to be about twice as expensive though compared to comparable PCs that I would consider as alternatives, so there's also that.