There are a few choices when it comes to security, mainly in the AntiVirus department. Some very good, free anti-viruses available to download are:

1) AVG 8 AntiVirus. Easiest interface to use, very fast scanning and doesn’t lag your computer at all. Only has a 76% detection rate, but catches the most harmful of viruses. If you’re a normal home user, you’re not in too much danger of higher level viruses and this is the AV for you:

2) Avast! 4 AntiVirus. Smaller, sleeker skin, average scanning speed, but reports alot of safe files as viruses, so you might need to watch out for that. 78% detection rate, but alot more complicated than most other free AVs. Use this if you are handy with a computer and you know what needs to be scanned:

3) Avira AntiVirus. Simple layout, which even the most basic of users can navigate. Incredibly fast scanning, with a 90% detection rate. Not as easy on the eyes as other AVs, and you need to know what you’re doing to get the more advanced features, but it is definite a candidate:
Personally I use AVG, but only because I go for the easier interface. If you are paranoid about viruses then the only real option is Avira. But if you just want normal protection, then any of the three will do it for you.

For any spyware problems, get SpyBot – Search and Destroy:
And for protecting your computer for malware or tracking cookies, use Ad-Aware 2008 Free Edition:

All of them are free, as powerful as paid programs, like McAfee and Norton (which only has an 18% detection rate!), and don’t use up as many resources.
Just boot into Safe Mode (Press F8 when turning on the computer) and run full scans.

Hope that helps.

Get NOD32 and Superantispyware. I got a free download link to NOD32 if you would like (non trial-version).

Use Super Anti-Spyware To Remove Spyware,adware, malware, Trojans, dialers, worms, keyloggers, and hijackers. Prevent potentially harmful to download Super Anti-Spyware Press here…

And Use Malwarebytes’ Anti-Malware is designed to quickly detect, destroy, and prevent malware, spyware, trojans. Can detect and remove malware that even the most well-known Anti-Virus and Anti-Malware applications on the market today cannot To Download Malwarebytes’ Anti-Malware Press here…

i don’t know about many spy ware programs, but i have mcafee and it completely protects my computer. its the best one ive ever had. it lets nothing bad to your computer.

Yes, download norton anti-virus and spy doctor its the best because i got lots of viruses and i downloaded it and its ALL gone!

I suggest mcafee complete security suite or even norton antivirus, these 2 have been superb, they have caught intrusion attacks everytime someone attempted to ping my system, and you would not imagine how many times a day some hacker idiot or overseas fool will attempt to access your network! some try every hour on the hour, and each and every time they block them from accessing and keeps a log of the ip address for you, and can trace it for you.

Free Security Guide for XP and Vista (32 and 64 bit):

You can protect you PC very effectively for free, you should always install a firewall and anti-virus before browsing the net as well as running additional anti-spyware software once a week, all these are avaliable completely free and are often better then the paid for software like Norton and Mcafee, below are links to the best free software, download and use all 5 to fully protect your PC.

Avast Anti-Virus Home Edition

Comodo Pro 3 Firewall

SuperantiSpyware:

Firefox 3:

WOT (web of trust) Add-On:

Install the WOT add-on it is a free internet security add-on for your browser. It will keep you safe from online scams, identity theft, spyware, spam, viruses and unreliable shopping sites. WOT warns you before you interact with a risky website. It’s easy and it’s free.

If you Looking Good Anti-Virus i would Recommend Use Avira AntiVir Personal Press here

Why is Avira AntiVir Personal it is Good Than Avast ,Avg,NOD32,Kaspersky, and Norton? Press here

Use Super Anti-Spyware To Remove Spyware,adware, malware, Trojans, dialers, worms, keyloggers, and hijackers. Prevent potentially harmful to download Super Anti-Spyware Press here

And Use Malwarebytes’ Anti-Malware is designed to quickly detect, destroy, and prevent malware, spyware, trojans. Can detect and remove malware that even the most well-known Anti-Virus and Anti-Malware applications on the market today cannot To Download Malwarebytes’ Anti-Malware Press here

Use The Best Browser Mozilla Firefox it is Best Web Browser Than internet Explorer Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking; tab-browsing; integrated Google search; simplified privacy controls; a streamlined browser window that shows you more of the page than any other browser; and a number of additional features that work with you to help you get the most out of your time online. To Download Mozilla Firefox Press here

Use 2 Toolbar To Block all Pop Up in you Computer Yahoo toolbar and Google Toolbar Yahoo Toolbar is a free and convenient search tool that now includes a pop-up blocker. Stop annoying pop-up ads, search the Web, access Yahoo Mail, and games. Customize your toolbar and save your bookmarks online for one-click access from any computer.

Version 7.0.5 may include unspecified updates, enhancements or bug fixes.To download Yahoo toolbar Press here

Google Toolbar Pop-up Blocker
Lost in a jungle of annoying pop-up ads? Toolbar’s pop-up blocker keeps your screen free and clear To Download Google Toolbar Press here

You generally need at least an anti-virus, a firewall and an anti-spyware. I recommend AVG Free, AdAware Free and a firewall software of your choice.
For best free firewalls see :