I recently bought an Acer 13.3" laptop with Pentium N3540 on 4GB memory. It's not a powerful machine, gave it to the kids to watch Youtube videos and do homework on MS-Word and MS-Powerpoint. No gaming.
It comes with 30-days free trial of McAfee LiveSafe. But do I really need to pay for it? Do I need paid internet security suite? I have Adblock Plus on Mozilla Firefox browser which takes care of annoying pop-up ads and banners. After the 30-days, I'm going to uninstall McAfee and switch to the free no-hassle Bitdefender Antivirus Free Edition. Unlike other free antivirus, this one doesn't prompt me to pay for upgrades.