After being a long time user of free anti virus software , the evolution of these programs has become the very problem that annoyed me with the bought programs .
I always used Symantec, and i love their firewall , and in truth the antivirus was pretty good too . I made the mistake on believing that it was poor because alternate programs would find hundreds of viruses that were previously not detected by Norton. However this was hogwash , the viruses found were not viruses and some were programs I had written myself, albeit in hotkey!
the biggest problem with Norton is the uninstall! How many installs have I destroyed with this uninstall? Too many! There is a uninstall utility from Norton that you must use to uninstall , do not use the uninstall that is available in add remove programs , there is a 50/50 chance you are gonna get knackered!
Avast was good , but i hated the interface , that stupid cd player got on my nerves! and it also found viruses that did not exist, but worse, did not find viruses that I know were present. Heuristic searches are a way for the anti virus to do a stop gap so that the programmers do not have to manually name and describe the virus that they may not know of yet. it is basically a guess, and as such it removes the programs or components from your use , sometimes disabling your apps. And then there is difficulty in bringing them back .One of the main problems is the Alexa toolbar for ie, it always marks it with a virus , and gives it a believable name , but of course is not a virus .
So you may thing your new anti virus program is great , because it found a lot more viruses that your old software missed but in fact it kinda just made it all up!
AVG was a great program , low resource , bit annoying with the false alerts (including Alexa toolbar!) , but now has evolved into a full bloatware , so I guess if bloatware with incorrect virus guessing is what you want go get it! If you want to stick with the earlier version and you have updated , then you have the many , many pop ups for there new version , practically every time you touch it.
Avira is also free , but is very annoying , and really slows the start up, and sometimes causes crashes, but is the worst for false detection!
I have found a low resource antivirus , that has no false detections and is easy to manage, and updates fast…and this is PCtools free antivirus software. It uses very low memory, and hard drive , scans fast and does not ever give a false detect. If you need a firewall then perhaps use a Norton install disk to install the Internet security part( when installing..choose custom) as the firewall is not part of the paid version and does not update and once installed runs forever without a squeak.
I Have uses the comodo and a couple of other Firewall softwares , and I really hate them , to have a program that interferes with your every move is annoying as hell!
So if you still use them slow computers and you want a basic antivirus (some of us still do) then Pctools is the one)!