It has been ages since the last time I got a virus, maybe 10 years. I'm a sensitive user and I know what a "double click" actually means.
Some minutes ago I've seen my Google searches, on both Chrome and IE, were altered by some nasty ads. I've quickly found that the ad stuff had been installed with PageRage: I removed it and it seems everything has gone away.
Now the problem: how the hell did I install a crap like PageRage? I use to enforce severe security patterns (no unsigned executables, no cracks, no strange stuff, ecc...) and just imagine my face when I discovered I had PageRage (a thingie that will apparently change the background of your facebook profile, who the heck needs this...) installed on my system!
My question is: do you have any clue on how I could get this crap and do you think I should, however, format my hard drive? Please note this machine has to be secure, I'm not a 14-y old boy that plays online flash games, I'm a software developer and webmaster and I handle critical sensible data.