This image will give you a clear picture of Comparision between different Antivirus softwares. However, I personally use AVG (Girsoft) for my Laptop.
Image Courtesy of Site: mhavila. I have listed few online scanners here which donít need any kind of installation. However, it needs a good bandwidth.




Complete information about Virus & Malware :
http://www.mhavila.com.br/link/security/malware/virus.html

Online Antivirus Cleaners:
1) Bit Defender Online Scanner is a fully functional antivirus product.
http://www.bitdefender.com/scan8/ie.html

2) Take the Kaspersky Challenge: See what your current antivirus is missing.
http://www.kaspersky.com/virusscanner

3) Trojan Scan is a good tool to find Trojans online.
http://www.windowsecurity.com/trojanscan/
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