text: why is service pack2 so much better than service pack 1, and takes up somuch space on a computer?   i assume you are talking about windows xp sp2. it is so much better than service pack 1 because it includes so many more security and performance fixes than sp1. it takes up so much space because it is a lot of fixes, has some new features, and it has an uninstaller. yes, you can roll back to sp1, so it needs a lot of backup files. don't ask me why, i don't get it. the new features are win xp yelling at you if you don't have firewall or antivirus software, or if it is off or outdated. also, it has a lame firewall. still better than nothing though.