How do I get rid of malicious spyware, malware, viruses or rootkits from my PC?
I've just got my laptop cleaned of dust and completely wiped - i.e. set to factory defaults - by a Sony service centre, and now my laptop is as good as new (or as close as it gets). Before I had that done my laptop's been getting really slow, I'm guessing due to viruses or other malware, and it'll likely happen again. Thing is, I have a habit of downloading stuff - TV series, movies, games you name it. And yes I admit some porn once in a while. I currently have an external hard drive full of that stuff, and though my laptop is pretty much empty now, sooner or later I'm gonna start downloading stuff onto it again. So here's my question: how do I prepare / secure my laptop to keep it clean? Before I had microsoft security essentials, malwarebytes anti-malware and spybot search and destroy installed, and though those cleaned up the laptop (supposedly) once in a while, the laptop's been slow still afterwards. Basically if I can pinpoint which files would be a problem in particular, then I'll avoid those. I know that no program would be 100% effective, but any advice would be appreciated.
Thanks in advance