For sony vaio laptop

Free or paid for ?
What exactly are your requirements as there's many to chose from and what one review says is best another disagrees on.

For a paid AV I like NOD 23, it runs a bit smaller than most of it's complication and gives excellent protection. For a free AV I use Microsoft Security Essentials.

OMG, MSE sucks. Its got no protection like Comodo Internet Security. That program has 20x the protection of MSE, maybe 100.

I am using Antivirus and Anti-spyware program. And I have no problems with PC security. My pick:
Antivirus: AVG
Anti-Spyware: SpyHunter