Panda Hooks In Antivirus What Gives?

well it like this bought nod 32 and as i installed it on xp pro. found that an anti virus by panda was their so i uninstalled it. after rebooting, it downloaded it again, what so i erased it again, then rebooted then it downloaded it again, what is going on, so i looked in properties of the network connection and low and behold the hooks that this program had in tcpip properties, what gives, it was very present in the properties of ver 4, ver 6 and msnet bios over tcpip, and others the then panda, so i uncheck them and then rebooted and guess what it still download it again, i found the culprit in msconfig, the start up and unchecked it their too, i hope my pc will run with out it now, and then i installed the nod 32, but guess what i had a three user license and the activation key of the second machine said that i had already activated the first and that it was an duplicate. can you beat that i still can figure out what i need to do to get three pc on the same license key. you cant get rid of the software you want and you can install the software you need now days, any way no clue charlie here, i give this a shot, anybody else their know what i should do on a delapidated xp pro machine?????
happy thanksgiving too