Well, there has been many questions here asking for "The Best Security Security Software", unfortunately there's none which can protect you 100%.
So here i've compiled list of security software's which can be used to protect and disinfect your system in categories of functions.
I'll keep it simple to ensure it's understandable for novice users up to advanced users.

Anti Virus
-Avira AntiVir Personal


-Avast! Free Antivirus


-Microsoft Security Essentials


-Panda Cloud Antivirus


-Comodo Internet Security Premium


NOTE!: *Only use ONE on your system.
: *If concerned about 0-Day Malware Threats Advisable to go with Avast!/Microsoft Security Essentials/Panda Cloud

Anti Spyware/Anti Malware
-MalwareBytes' AntiMalware


-SuperAntiSpyware


NOTE!: You can have both on your system as the free version doesn't provide real-time protection

Firewall
-For normal users, it is advisable to use the built-in Windows Firewall which is sufficient especially the ones in Windows Vista or 7.

-For Advanced users and would love a firewall wit HIPS I would suggest the following:
-Comodo Firewall
-PC Tools Firewall Plus


Misc. Security Software
-Prevx SafeOnline 3.0 Facebook Edition


-Sandboxie


-Spyware Blaster


Free Antivirus Comparison Chart by Brandon2010 (Forumer from Wilderssecurity.com)



Updated on 13/3/2011 (10:15PM)

References: To get test results and information on the security softwares.
AV Comparatives (Link)
Wilders Security Forum (Link)
NBR Security and Anti-Virus Forum (Link)

This post has been edited by Eugene91: Mar 13 2011, 10:14 PM

PCtools

Free antivirus
http://www.pctools.com/free-antivirus/download/

Threat fire
http://www.threatfire.com/download/


This post has been edited by robertlee: Jul 22 2010, 07:51 PM

Thanks for the info. BTW, wont be putting up PC Tools Free AV.. i'll only put the most recommended AV's there..


Threatfire is a nice behavorial blocker totally forgot about it thanks for the heads up .

wanna ask about avira proactive.

is it available in free version? from wat i saw from the webpage, proactive doesnt list in the free av column

Seems that it's not there on the Avira AntiVir Personal 10..

btw, av-comparatives uses Avire Premium for the test

Well Avira has FP's too according to AV Comparative's.. I think I should state it there

Oh ya and ProActive is not refering to Avira's ProActive Module..

ProActive protection means when new malware emerge and the Antivirus handles it with heuristics..

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Added on July 23, 2010, 2:05 pmHopefully the Mods pin this thread up

This post has been edited by Eugene91: Jul 23 2010, 02:05 PM

how come no one mentioned AVG free?hmmmm...

because some users use false info.

because most of the people do have bad experience wit it i believe, it is not a good security software anymore.

Nope. Check it out. http://www.free-av.com/en/products/1/avira..._antivirus.html

Expanded Online Testing of Files – Participation in the Avira AntiVir ProActiv Community
The threat of new viruses and malware is continually on the rise. In many cases, traditional detection methods are no longer sufficient in effectively protecting you against outside attacks. New detection technologies must be added in order to effectively ward off attacks, especially by new viruses and malware.

With Avira AntiVir ProActiv, Avira makes just such a new technology available to you. Based on your system’s behavior, Avira AntiVir ProActiv can detect whether it is currently being attacked by a virus or malware and can initiate effective countermeasures.

On the basis of integrated rules, your Avira product autonomously decides whether one or more events on your system are attributable to a virus or malware attack. These rules are created in the Avira virus laboratory from the analysis of viruses and malware and made available to all Avira customers.

You can participate in the improvement of these rules and with it in the worldwide battle that Avira is waging against viruses and malware by using the expanded online test and joining the Avira AntiVir ProActiv community.

What takes place during the expanded online test and what data is transferred in the process?

In cases in which no unequivocal conclusions can be drawn based on the system's behavior and with the aid of the rules as to whether one is dealing with an attack from a virus or from malware, the Avira servers are queried as to whether the file that caused this behavior requires analysis. The following data is transmitted with this inquiry:

Information about the relevant rules
The MD5 sum of the file
The size of the file
Version number of the rules
If the answer is YES, the file is automatically sent to Avira. In doing so, the following data is transmitted:

The MD5 sum of the file
The file name
The contents of the file
The transmission occurs via a secure HTTPS connection. The transmitted information itself is encrypted.

Except for the above data, no information or personal data whatsoever that allows inferences to be made about the sender is transmitted. All submitted data is used solely for the purposes of analysis.

All events for which data is sent to the Avira servers are logged in the log file of your Avira product.

Source: http://www.avira.com/en/pages/pages.php?id_pag=538


Yeah, Avira has few FPs now~

Because even those over at WildersSecurity seldom talked about AVG lol.. It became unpopular due to its detection rate.. AV-Comparatives speaks for itself..

hmmm.... let me make a guess. detection rate of avira is high is because of the ProActive module?

No, I do not think so, they are pretty new in HIPS. I think they have the best heuristic engine in the industry.

Yeah. matured HIPS would be like Comodo's Defense+ ..

really hope tat comodo can make their product more user friendly.

last time i tried to use their firewall, in the end it cut off my internet connection

tat was few years ago

I like the Firewall.. "feels" safe.. and rated the best in matousec firewall tests..

If you want it simple.. just use Windows Firewall

This post has been edited by Eugene91: Aug 1 2010, 05:45 PM

Used to use Avira+Threatfire combo. And Windows Firewall.

Threatfire seems like a dead software now? I don't see it being updated..

Still updated everyday. However if you mean the version never change, . PC Tools Antivirus uses same engine with Threatfire for proactive detection. So I guess if PC Tool comes with major version change it will be followed by Threatfire.