not really.
There seems to be an assumption been made that if one doesnt have real time file protection (an anti virus that scans everytime you do anything such as opening notepad.exe) then they going to be swamped with malware.
Essentially you dont need a software firewall if you have a router or hardware firewall, if a software firewall detects something dodgy going out then its too late you infected. That same infection can then of course control your software firewall, thats the reason I dont bother with software firewalls, its just downsides with questionable upsides.
This leaves http and email scanning, as well as document scanning, all these are covered by seperate modules in the best anti virus programs which leaves the real time file-scanning as a duplication that can have severe downsides.
The worse thing about all this is people buy into it, they will buy norton, kaspersky or whatever, turn everything on and think thats it job done. Malware bytes and some other programs will detect many things these anti viruses do not, so it pays to regular on demand scans with these programs.
So given that I have not been infected in over a 10 year period, any anti virus I have ran has only ever detected TWO viruses in a 10 year+ period from normal use (both over email) I think I would rather have the slim chance that I could pick up a malware, and then format and reinstall afterwards then put up with the slowdowns and incompatabilities of an agressive anti virus.
Many malware will typically be far less disruptive than an antiv virus program as well. Most malware is harmless.
I have known people who have caught viruses, all of them have kids, who install any software they come across, toolbars etc.
If you wonder what do I do if someone sends me a file over msn or irc or something similiar then the file is scanned using a on demand checker by myself.
Some anti viruses arent too disruptive such as nod32 v2.7 others are aweful, my dad runs norton and I expect a machine with 10 viruses on would run faster than his.
So yeah I prefer having malware (for a short period) then dealing with anti virus protection issues, however its not a choice I make since I dont get malware in the first place.
If I setup someone else's pc for them, I set them up with something like nod32 v4 everything turned on or if they not willing to pay for an av then avast (defenitly not comodo). I will then put something like spywareblaster in place on top of that and some adblocker combo. Tighten up their cookie/javascript/activex settings and tell them to use opera or firefox for browsing. Then hope for the best.
I myself I use nod32 v4 (recently just jumped from 2.7) with http/doc/email scanning enabled and on agressive settings, currently real-time file scanning is also on but is possible I will turn it off as I am already seeing things I do everyday been slowed down by it. Now I have configured it so it detects more stuff. Meaning my nod32 setup even without file scanning will detect more than a out of the box nod32 because out of the box advanced heuristics is disabled. In addition I block various malware links in my hosts file, disable a load of insecure activex stuff, tighten up my IE settings so only sites I add to my trusted zone can use javascript etc, use firefox with adblocker, use proximitron to block ads and dodgy code, manually scan anything I download, keep my software up to date, block all cookies without approval, all flash content will not play in any of my browsers without me approving it. My email is converted to text by default, and I do regular scans with both nod32 and malwarebytes. I do some other things as well and I expect I will be far less likely to get anything than joe bloggs who downloads big security package, turns it on and thats it. I also dont really use removable media much, anything burnt is what I burn myself and my usb stick is just used as a boot device and file backups.
So the question is since I scan everything that is inbound to my computer and I then run regular scans to check for infections, why do I then need to scan every file open/execute? There is a lot of FUD been spread around but again it is down to simply been aware of what you doing and how malware works.
Microsoft Security Essentials isnt too bad for a free program, I did find the performance impact too noticeable so wont use it myself now but will likely at some point start putting it on others machines if they not willing to pay for a better anti virus.
Everyone I know who has had an infection (not many people) all ran anti virus's with default settings. These apps do reduce the risk but thats it they dont protect against human error.
Edited by Chrysalis (Sat 17-Oct-09 12:22:29)