You can remove messenger with this, its safe to do as I do it with ever reloading of xp I have done with notglitches just a faster opening outlook when I'm done.
http://www.dougknox.com/xp/tips/xp_messenger_remove.htm plus go to outlook express options and uncheck load messenger on the first tab there.
AVG has a spyware program and I think it is a good one too, I presently don't have it loaded but have in the past and it didn't seem to slow anything down or I never even noticed it was even on the machine.
If you were to go into add/remove programs and look through there you probably will find a listing for earthlink and you can permanetly remove it from your computers, look through that list and if there is anyone of the programs listed that you know you don't use then remove them. set a restore point before you do so you can go back if you make a mistake and find you need that perticular program. If you set a restore point before you remove each of the programs you will be covered in going back the way it was. You have to be careful but you don' have to be afraid to do it. If you are reluctant to do any of this then get one of your friends who have some experience with things like this to give you a hand. My experience for the most part with windows is if you don't use it or don't need it then remove it as it is only dead weight and files your harddrive has to search when it looking for something so by removing unnecessary programs will speed up all facets of your computering. Windows xp home is normally a 553 mb install disk where this one I have loaded now was only 205 mb because of all the stuff I've removed and I must say it is so much faster for it too, If my computer could kiss I think it would give me a kiss each time I turn it on because of it too;-)
Never be hesitant to ask question because we have some damn good computer whizes here on this forum, of which I am not one of and they always will help you out and with a smile at that, so happy complaying.