Can anybody tell me, which of the best antivirus software for PC ?????

Now I m using Laptop with 1.60 Ghz dual core processor n 512 MB RAM, 120 HDD. But some virus comes in my pc like Trogen Horse n like that. So pls tell who's antivirus is good for my PC. n where I can get free of this software. That software should be not slow my PC. Pls Pls help me...........

Thanks in Advance

Can anybody tell me, which of the best antivirus software for PC ?????photoshop

All of these are ones that I personally use and all are free.After you install any of them,make sure you update them to get the full affect.

Download Grisoft AVG 7.5 Anti-Virus,Anti-Malware.(free)

AVG is a collection of anti-virus protection tools that gives you full protection against viruses, worms, Trojans and malware. AVG provides you with all that you need to be completely protected: including a tool for scanning your hard drive and e-mail, as well as a real-time shield to prevent infections.

Top Features

禄 Provides automatic update functionality

禄 Its a reliable anti-virus scanning engine

禄 Provides free Virus Updates for life

禄 Options to define file name extensions

禄 Real time protection with resident shield, email scanning

http://free.grisoft.com/doc/5390/lng/us/...

Spybot - Search %26 Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications. Spyware silently tracks your surfing behaviour to create a marketing profile for you that is transmitted without your knowledge to the compilers and sold to advertising companies. If you see new toolbars in your Internet Explorer that you haven't intentionally installed, if your browser crashes inexplicably, or if your home page has been ''hijacked'' (or changed without your knowledge), your computer is most probably infected with spyware. Even if you don't see the symptoms, your computer may be infected, because more and more spyware is emerging. Spybot-S%26D is free.