I Get By With A Little Help From My Friends

I am sooooo ready for it to be Friday! As you all know I am using the computers at the library. Apparently no one does any kind of maintance on the machines, because they are clogged up with all kinds of crap. Can any one reccomend a good Spyware program? It has to be a freebee because they aren't going to pay for one. Also a good pop-up blocker,again it has to be free. I seem to remember that Brenda gave me a link to a great one but I don't remember what it was. I'd sure appreciate any info that you all can share with me.
Ya'll have a great weekend!