My computer was running extreamly slow. So, I downloaded windows XP which is what I had at originally, but with SP2. Now I can't download all my updates "fail". I can not download windows defender, microsoft installer 3.0. I have tried numerous times to download SP2, but it just keeps bringing me to Microsoft Updates, which SP2 is not an option. I can not re downlad Norton or Java. I got I tunes back on my computer yesterday, but still can't download anything else. I also have another computer in which I upgraded from Windows 2000 professional to XP professional and it does the same thing on my other computer. Any Ideas on what is going on with my computer?