hi i have windows xp from about a year ago and just had to reinstall. I was just wondering is sp2 necessary and if so how should i get it. I dont have the disc, and ive downloaded it off the internet but i think ive picked something up both times ive tried it.(my computer takes forever to shut off after downloading it twice now)I dont know if theres a safe place to get it. can i just do my automatic updates and get it that way. will i get everything i need through windows automatic updates?