My computer is starting its standard third-year death spiral. Basically, there's a 40% I can get on the Internet at any given time, and adware popups and fake virus-protection messages constantly knock me out of games (they're obviously part of some sort of malware themselves, though I don't know what), and, bizarrely, the speakers occasionally play audio from various videos (apparently from BBC or something) without any input from me; the only fix is to log off and then back on.