Internet is very dangerous place for your computer unless you have an up to date anti virus, anti spy ware, firewall software etc installed on your PC. Fighting against online threats including viruses, Trojan horses, home page hijackers and hackers trying to get access to your computer is easy as I bring you best and most popular free available soft wares and programs that will make sure that your PC is safe against any such danger.
Here is a list of Best Available Free Computer Security Programes:
AVG Anti-Virus Free Edition
AVG anti virus is available FREE for home user for life of product. It is easy to use and does not slow the speed of the system. Highlights include

- Automatic update functionality.
- The AVG resident shield provides real time protection as files are open and programs run.
- Free virus database updates for life.
- Clean, easy to navigate interface.
Ad-Aware 2008
Ad-Aware cleans your system easily allowing you to maintain a higher degree of privacy when surfing the web. The key points include.

- One of the first applications built to remove spy wares and ad wares.
- Now compatible with 32-bits and 64-bits windows vista.
- 2008 version includes an improved threat detection, enhanced root kit removal system, faster updates.
- Number 1 in spy ware remover list (out of 291 products at download.com).
Spybot- search and destroy
Spybot can detect and remove a multitude of adware files and modules from your computer. Other uses include.

- Cleans programs and web usage tracks, especially useful if you use share computer.
- The handy update feature ensures that Spybot always keeps updated about new adwares etc.
- The new version has improved speed for on-demand scans. Supports all famous browsers.
- Number 2 in spyware removal list (on download.com, from 291 products).
Advanced Windows Care Personal
One click approach to help, protect, repair and optimize your computer. It provides all in one and super convenient solution for PC maintenance and protection.

- Removes spywares and adwares, prevent security threats, privacy protection, fixes registry errors.
- Temporary files cleanup, start up clean up.
- Repairs Windows and speedups the system.
- The restoration option can return your system into its original configuration.
- So if your system is slow and you are considering reinstalling Windows, try Advanced Windows Care Personal.
- Most popular diagnostic software (most downloaded in diagnostic softwares for Windows on download.com)
Avast (Home Edition)
This is one of the most popular Anti virus software. It can also be run from Explorer context menu. It is up to you if you want to scan selected folders or entire hard drive. It comes with antivirus screen saver.

- Simple to use and fully automated, install and go.
- Tried and tested by over 50 million users already.
- Automated upgrade, Keeps itself up to date automatically to prevent your system from any threats that are new on internet.
- Comes with anti-spyware and anti-rootkit protection for windows.
- Avast is offered in over 30 languages other than English.
Trend Micro

Ok this is great chance for you guys, just download the Trend pc–cillin software from this link and use the following serial number to convert the trial version into full retail version.(Serial Number: PFEP-9991-7436-4997-1545). This offer is totally legit and is part of promotion between Trend Micro and residential internet customers of HTC ISP.


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My vote is to Avast.
Yes Anish i am using Avast as well and it rocks
I used to use McAffee and Nortons, but now I use AVG and I think it’s a whole lot better.
I use Kaspersky Internet Security 2009 .., but it is pretty expensive license, I think a try and I avast
I also used AVG. And I can say that it was better.