AVG 8 free is the best, which has got 80 million supports in the world, the largest support ever
VERY IMPORTANT: people always comment negative things on AVG becoz they are fools and never used avg anytime before
whats there in avg?
Anti-Virus protection: It detects worms, trojans as well executable DLL files that could be potentially unwanted
Anti-Spyware protection: It protects you from not only spyware but even adwares and all tracking cookies
Email Scanner: It scans for incoming as well as outgoing mails and is compatible with any email client software
Link Scanner: consists of avg surf sheild and avg search sheild which identifies malicious websites
Resident Shield: It scans files when opened, closed and saved and it also scans for tracking cookies
AVG provides 3 types of scan
1)Scan whole computer
2)Scan specific files or folder
3)Shell extension scan (right click a file to scan)
AVG uses heuristics scan, it also scans system environment
Disadvantages
No anti rootkit protection: dont worry for anti-rootkit protection you can download the separate avg antirootkit tool of size less than 1 mb from here http://www.pcworld.com/downloads/file/fid,65198-page,1/description.html
No customer care support: You can make use of the avg forums where u can definitely get help http://freeforum.avg.com
MAJOR BENIFITS using avg:
1) light weight, the updates size are also very small they will never increase your internet bill whereas all other softwares provides u with useless updates and useless definitions just to generate income out of the freeware
2) AVG will never slow down your pc