Okay so yes i did see the keeping your computer clean but its form 04 and doesn't have a few good companies.
Some important tools:
Malwarebytes: One of the most well know anti-malware tools. You can use it free or pay for active protection and updates. I recomenned every one ahs a copy of this a scans from time to time. (If you use the free one make sure you update before scanning)
Norton Utilities: You can get a free 30 day trial this comes with endless amounts of tools to help your computer. Ones of the best programs to keep on your computer for cleaning it out.
Ccleaner: only one of the most well know cleaners out there and its FREE! This thing is your best friend simple and fast to the point.
Firewall: YES you should have a firewall the more advanced one your willing to deal with instead of your windows automatic one the better. For a simple one check out Pctools or more advanced theres Online Armor or Comodo.
Norton: So many people hate it for the speed true but Norton dose offer some of the best protection around. They have some of the best detection and quick to update against new viruses.
ESET: This company is rising VERY fast lately some are saying its going to be the next Norton in popularity wise. With not only great protection but some great email options for those of you who still download your email.
Panda: Was once know as the top dog but many believe it is loosing its steam.
Pctools: Becoming a big name AV. Pctools is most popular for there firewall and spyware doctor. Pctools is a simple but yet advanced AV.
Bullgaurd: Not to well know but good active protection telling you if you are in the middle of DL a virus. But on the flip side this will slow down your DL etc.
(There are many more but i'm covering some of the most well known)
(Many free also have paid version)
Avira: One of the most well know free AVs available.
Avast: Very well know among gamers for a free AV. And might be the most popular free AV.
Comodo(CIS): Most well known for the firewall but there security suit is growing fast.
MS security essentials: Not majorly advanced but completely auto piolet for people who don't want to deal with any thing.
AVG free: Basic anti-virus and antispyware protection for Windows. Limited features, no support, for private and non-commercial use only.
Norton: Norton is probably the most well know among AV and other similar tools developed by Symantec. Norton AV can be a resource hog but supplies some top of the line AV. So far i have never had any thing slide through Norton that didn't on any other security suit.
For gamers Norton provides a gaming edition which will stop scanning etc while in game. And dose pulse updating between very 10-15min while in normal mode so no more long updates. I have tested many gaming AV and so far Norton was the best. With almost no effect on ping. I found the gaming edtions nicer then there normal.
ESET: Claims to have never missed any viruses released. If you do download your email you should look into ESET for there great email tools. I found ESET very similar to Norton.
ESET dose provide specs for gaming with ESET but have not yet released a version for gaming and even with there specs i took a hit to my ping.
Panda: Looked nice and claims to be ahead of the curve and are releasing a free version. I found Panda to be more of a nice looking and easy navigation then detection AV.
Pctools: Might just be the simplest AV for some one to control with decent detection. Pctools is very popular for its simple to use tools. Pctools dose not consume to many system resources.
Bullgaurd: Active protection telling you if you are in the middle of DL a virus. But on the flip side this will slow down your DL etc. Very simple to use but i found it scared my wait times to DL and open folders by having to active protection.
Bullgaurd offers a gaming edition certified by steel gaming that detects a .exe launching and will go to gaming mode. I gained about +5-10 ping.
There are tones more out there for you to try. I have used almost all them but in the end you have to decided. If you want some mroe help feel free to contact me!