This is why so many people have "slow" computers. They just go on through and install anything and don't read anything when installing and you end up with 5 toolbars that the average computer user doesn't know how to get rid of. Even with some programs, I think AVG got bad about this, you can uncheck the install toolbar, but it installs anyway. Most programs like to go in and put themselves on your Windows program startup list. Adobe, Java, iTunes, Cyberlink, and plenty of other stuff that has no need to start when the computer turns on has several entries in the startup list...
My parents went to visit my grandma, and my dad used her computer. He said there was 3-4 toolbars that took up almost 1/4 the screen, and the computer was unbelievably slow. Had I gone up there with them I would have fixed it for her. All it is is a bunch of programs all running in the background for no reason. This is why those people can buy more RAM and actually notice a performance boost. Not because the computer is getting older and they need more, but because all the background programs are using up the available RAM, so adding more gives you some extra free RAM to use until that's filled with more background crap...