I'm still on XP so I'd say restore points is best if you're really jacked up. If that don't work, it's time to pay the piper. If you can load free proggies, Malwarebytes and Spybot are quick but didn't do the trick the last couple of times I used them. I've had better luck with Avast. I'm still waiting to hear how my buddy did with BitDefender's bootup disc. I hate to admit it (after +15 years doing this) but these days it's almost worth spending the $35 for Norton or FixIt. Good luck with the updates.
Once you get going, Zone Alarm Firewall fire wall is fast and efficient, but I've been using Comodo lately.
And yes there is pron on the internet:
http://www.xnxx.com/
http://www.pornhub.com/
http://youporn.com/
I think there's one called Tube8. It'll send down so many $hit crackers at once, you can't shut them down quick enough.