Mac osx 10.3 anti spyware program

[statue12]

I bought a mini mac which is runing mac osz 10.3. Just wondering if theres any free anti spyware application i can get.

Thanks

 

[Apokarteron]

Norton AntiVirus 10 for Mac I find is the best, McAfee Virex didn't work for me, it couldn't download updates.