Norton Worked fine for me until 2003 Professional, After that it is piece of j**k, eating memory, making system too slow.
Then I was using AVG for 5 years & Kaspersky for 2 years.
From Norton 2009 & 2010, I am seeing some good reviews.
Hope Norton is back in market
ESET Nod32 has consistently been the best. Results from ICSA Labs, VB100, AV Comparative Labs, and other Independent 3rd party Antivirus testing companies vary a bit from year to year, but Nod32 is definitely a front runner. I use it everyday in my Computer Repair shop and my customers that have switched to Nod32 have a SIGNIFICANTLY lower reinfection rate than those who use other major brands. Laboratory tests are one thing, but what I see in real life with first hand experience is what I bank on. Also, a perfect compliment to Nod32 for active antispyware protection is SUPERAntiSpyware Pro. Both offer free trials to get your started, which can easily be converted to the full paid version without reinstalling, they just need the codes to be entered.
Immunet Protect works great; you can use it alone or side by side with other AV software for added protection and it doesn't slow your computer down at all.
In the past 4-5 years I used norton which was good but spendy. I switched to bitdefender. Seems to be good plus it also has game mode which norton does not. And a yearly prescription is about half the price of norton.
Bit defender is what i use and have never gone back, is incredibly light weight as well as hourly updates, i have pretty much used or played with most other anti virus but none compared to bit defender
is very cheap too compared to most plus you get 3 pc's protected for a year 😀
I voted Kaspersky because it has several features, such as how many Kaspersky users have used the application before, and if it is a trusted rating. The only downside is the slow scanning.