If you want to protect your system, you can use a free anti-virus, but for those surfing the internet and making transactions online please get a paid version so as to protect files on your system and also your own personal information too. If you are thinking of buying one you can simply reply this post, find features and price list in Naira below.

Antivirus Anti-Spyware Sandbox SafeZone WebRep Antispam
avast! Pro Antivirus Y Y Y Y Y

avast! Pro Antivirus
license 1 year 2 years 3 years
1 6,000 9,000 12,000
3 8,500 12,000 17,000
5 13,500 19,000 27,000

Thank you