Just reinstalled xp home sp2 on my desktop. Downloaded sp3 and installed ok. Windows updates will not work either before or after sp3. Infact it crashes the computer. when I reboot ; I get freezing again. The only way to resolve this is too reinsatll sp2 and then sp3. So I am going to leave at sp3 until I get sp3 pro installed. I have avast av and zone fw installed. So is it safe to browse in the mean time using firefox not IE? I understand to safley browse in windows, one needs a good av, fw plus a updated windows system or is having a updated os really needed?