Last time I used Kaspersky Internet Security 2009 and 2011 versions. it was vegy good in ad-blocking. no other banners/flash videos on a viewing pages. blocked about 18-19 banners from every 20.
>but I know that Norton is at least good at detecting malware.
hm.. can not say that it is fully true in my cases. tried it in offline mode on my work today. some threats (some rootkit, hidden service of svchost.exe -netsvc or close to it detected by GMER, and USB sticks worm) are still persists after norton work (2 full system scans and 3-4 reboots). 8-10 infections was recognised by NIS 19.1.0.28 (with no any updates, only with todays definition update file installed, oflline work), but work on my flash drive (used after cleaning and scanned after work) contain worm and GMER and HitManPro (offline scan) after Norton cleaning process are still reporting about svchost.exe -netsvc RootKit activity. Viruses there is only from local subnet and USB sticks, there is no internet connection. so viruses probably are old, or slightly old.
I began using NIS from 2009 version. and saw the works of every 2010, 2011, and a very little of 2012 work and can say that Norton is bad (yes, bad) in detecting of !active! infections, but Kaspersky and DrWeb can do it very good. they can easy, have such strong functionality to terminate active processes, norton have not. Norton 2010 in december 2009 was unable to stop Sality active infection. I start the infected file with NIS disabled and start NIS after 4-5 seconds after infection start. Norton and virus just load CPU for 100% for a 40 minites and I am giving up... reset the computer. Norton only prevent from starting Sality - detect it only while infection starts.
Such examples I saw only on my computer during 3 years about 5-8, not remember... I know what if after infection to install DrWeb or Kaspersky scanner or internet security suite (or different machine install and trying to infect it), they can easy detect and terminate active infection, but using much of resources of CPU and memory... but they can stop infection.
So for last 3 years of my experience I have opinion that Norton giving up more frequently against active infections.
Why?
May be to rewrite dtetection and termination modules of Norton? Then it will be more strong, but again: samples sended by me twice are still remaining undetected by Norton - about 10 samples was added into blacklist and next are not (for a month or more):
http://www.virustotal.com/file-scan/report.html?id=a0fc6be8d2e2a2d25443838c83e9d6cea0174dddf47b80dbb0efbc7afaaf8884-1316627732
http://www.virustotal.com/file-scan/report.html?id=154ceda7efdea3145fcff66ff7418dc622656d7bcef1a92c076b330deabb4215-1316628157
http://www.virustotal.com/file-scan/report.html?id=868b1aee31c6335a5fc4257f20346e2d99fbd86bc7554b415da41fc19b13b3b1-1316627706
http://www.virustotal.com/file-scan/report.html?id=9273ad398315046342a7ad969353af0fd6f57f8cd97b22085f247cabcfc6d454-1316627699
http://www.virustotal.com/file-scan/report.html?id=e5ee4fd81fe606fb28c74807a004287a9c5848b2b47858f665472c13a16353f4-1316627697
http://www.virustotal.com/file-scan/report.html?id=1ca17028b1f4c85a4913ded7d29e02e0236d4b3e65fa451483b8114e93eb4959-1316628135
http://www.virustotal.com/file-scan/report.html?id=eac1b0a8068f46554e899113474a5f84d95773c77a24e8c5c4b74a19f734d40d-1316627693
Again.. each company have each opinion what is malware. probably by Symantec it is not malware. I found it by using 3rd side programs on my computer, most was from my web browsers cache folder. Studing what it is and what it is donig whaile active - for me as I think - it is 100% malware.
During all time I upload it to analyse to Symantec server once in 4-6 days.
Probably it is all that makes Norton not the best for me like russian user.
I wish Symantec direction to heard it.
Thanks for attention and given and giving good security support in other very good sides of Norton!
PS
was infected by and catched by Norton:
http://www.virustotal.com/file-scan/report.html?id=baa78b222e7c28948d474c0968b1febd375123c120fce0c15976540d9b4d78e8-1316629622
http://www.virustotal.com/file-scan/report.html?id=7fb855a7a2d4a2e2be9c1b6a1a87ca57aa8fc927df628d48be54156661de70a5-1316629683
http://www.virustotal.com/file-scan/report.html?id=4202574ee60beb13a329f4ba6f6bc55a6e3cfbdfccab929f50024603d9cde020-1316629704