Better anti-virus: Norton or Kaspersky?

i bought new laptop (Dv6t-7200) & it has a 60 days free trail Norton Internet Security on it. i need to know which one is better? kaspersky Internet Security or Norton Internet Security? i already bought Single-User Kaspersky license but i don't know if i should remove my defualt Norton or not. with... show more i bought new laptop (Dv6t-7200) & it has a 60 days free trail Norton Internet Security on it.
i need to know which one is better?
kaspersky Internet Security or Norton Internet Security? i already bought Single-User Kaspersky license but i don't know if i should remove my defualt Norton or not.

with logical reasons i can buy new License for Norton. i just need to know which one is beter so i can do that :)

thx

please help
Update: my Question is about Internet Security (not Anti-Virus)
Update 2: my Laptop has Windows 8-64 bit on it.I tried to install Microsoft Security Essentials (M.S.E.) from Microsoft.com, but it said we do not recommended you to install M.S.E. on Windows 8.
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