I use Spybot, Ad-aware, Swat-it, Regcleaner and Rambooster amongst other ones
I defrag quite often, delete useless things, yadda yadda
Your comp needs to be maintained and looked after otherwise two eyes on stalks pop out of the floppy disk drive and your work/play area starts getting slimey due to your computer being more slug-like everyday
I still, however, have an option to visit "HARDCORE MOVIES!!!" on my right click menu on the desktop tho.... Not sure how to get that off
good luck