kaspersky is hands down the best with NOD 32 a very close second
But NOD 32 has too many false positives
I also find Kaspersky annoying (paid version)
So after a long time, I now use AVG Pro, which is good enough, when combined with Zonealarm, FireFox and Thunderbird, and ProtectX
The AOL kaspersky is the free "lite" version which after all, may be the best leanest situation.
AVG (non free) for now has about 15 versions -
http://www3.grisoft.com/doc/5/lng/us/tpl/tpl01
Merger with Grisoft
ewido is now part of the Grisoft family. ewido users and customers can now also take advantage of the huge resources regarding threat research and support available from a world leading AV company.
Read the press release
ewido anti-spyware 4.0 has been replaced by AVG Anti-Spyware 7.5 and isn't available for sale and download anymore (under the old name). Instead, please try our new, highly improved version: AVG Anti-Spyware 7.5
heres the security suite......
AVG Internet Security 7.5 Build 425a814
Complete security protection against all of the most serious Internet threats, including viruses, worms, trojans, spyware, adware, hackers and spam.
OverviewIncludes
Anti-Virus protects from viruses, worms and trojans
Anti-Spyware protects from spyware, adware and other malicious programs
Anti-Spam filters spam and protects against phishing attacks
Firewall protects from hackers
Benefits
All-in-one, easy to use protection ? install and forget
New program versions and updates, for free, throughout the license duration
Quality proven by all major antivirus certifications (VB100%, ICSA, West Coast Labs Checkmark)
24/7 technical support provided at no extra cost
Features
Improved virus detection based on better heuristics and NTFS data streams scanning
Unique automatic threat-removal anti-spyware engine
Automatic firewall profile switching for improved security and usability
unquote.........
FWIW: Kaspersky has a emergency rescue CD to run AV scans from booting CD. Highly recommended for really fubarred systems.