Note, that Symantec will conflict with the XP firewall settings in the SP2 upgrade.....I received a screen asking to turn off the Windows and turn on the Symantec.
Maybe I missed that screen when I downloaded SP2. I'm using the 2005 antivirus program (it was the latest version available). But when I try to install it on XP Home I get a screen that says: WINRAR Self-extracting archive: NV11ESD.exe - ordinal not found," plus some other (to me) gibberish. I tried a new download from Symantec and another installation but same deal.