Check this

來源: 於 2004-10-03 19:46:39 [舊帖] [給我悄悄話] 本文已被閱讀：次

Right click on "My Computer" --> "Properties" --> General, look at your System item, it should say:
"Microsoft Windows XP
Home Edition
Version 2002
Service Pack 2"
The last line states that you do have SP2.
or you can also check in "Control Panel", if you see a new icon "Windows Firewall", you do have SP2 installed already.
Good Luck.