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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: AvastForever on November 04, 2005, 03:15:49 AM

Title: Avast is not good in detecting Trojans?
Post by: AvastForever on November 04, 2005, 03:15:49 AM
I just heard that Avast is not good in detecting NON-virus stuff like Trojans. I think this is false. Anyone one who really knows Avast 4.6 can tell me if this is false or true. I dont believe him. He said that it cant really detect Trojans. Or just a note: He was a NAV user.
Title: Re: Avast is not good in detecting Trojans?
Post by: Eddy on November 04, 2005, 03:28:43 AM
Please read the malware removal section on my website. (see my signature)
I believe it will make things more clear for you.

There is so many malware, that it is impossible for 1 application to detect it all.
Therefor there are applications that concentrate on 1 or a few kinds of malware.
Nowadays anti-virus software is basicly a wrong naming, they do not only detect virusses, but all kinds of malware.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 04, 2005, 03:33:30 AM
Ok. Hey i maybe goingdownload AVG version 7.1 as a On-demand Scanner and im going to disable the ON-access scanner beacuse i got Avast. Is this ok to have these on my computer? I have only Avast and ANTIVIR, which ANTIVIR is deacivate because Avast is on.

Avast: On with On-access Scanner. You know the providers
AVG: NOT ON, just for scanning
ANTIVIR: NOT ON, just for scanning.
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 04, 2005, 03:39:18 AM
Ok. Hey i want to download AVG version 7.1 as a On-demand Scanner and im going to disable the ON-access scanner beacuse i got Avast. Is this ok to have in my computer?
No trouble if you do not install ANY resident (on-access) scanner. Not even the email providers...
The Explorer Extension won't hurt.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 04, 2005, 03:43:37 AM
Ok. Hey i want to download AVG version 7.1 as a On-demand Scanner and im going to disable the ON-access scanner beacuse i got Avast. Is this ok to have in my computer?
No trouble if you do not install ANY resident (on-access) scanner. Not even the email providers...
The Explorer Extension won't hurt.

So i just disable the resident scanner of AVG and i be fine?
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 04, 2005, 03:47:52 AM
So i just disable the resident scanner of AVG and i be fine?
No, NOT INSTALL which is different than disable.
After, you can set both AVG services to manual run (but you can let them to automatic).
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 04, 2005, 03:49:12 AM
So i just disable the resident scanner of AVG and i be fine?
No, NOT INSTALL which is different than disable.
After, you can set both AVG services to manual run (but you can let them to automatic).

Ok thanks
Title: Re: Avast is not good in detecting Trojans?
Post by: Eddy on November 04, 2005, 03:53:49 AM
Having 3 av's on 1 system is a overkill.
Better use 1 av and a online scanner as backup.
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 04, 2005, 04:01:20 AM
Having 3 av's on 1 system is a overkill.
Why? You'll call me crazy as I have 6 backup scanners...
Title: Re: Avast is not good in detecting Trojans?
Post by: XtremeKirby on November 04, 2005, 04:19:18 AM
I heard that antivirus's and firewalls install drivers into your operating system kernal so that it starts as soon as the OS boots, so won't having two or more AV programs cause a conflict? I was told before that drivers can cause problems even if they aren't running. I don't know... I might be wrong, it's just a thought.  :-\
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 04, 2005, 11:56:47 AM
I heard that antivirus's and firewalls install drivers into your operating system kernal so that it starts as soon as the OS boots, so won't having two or more AV programs cause a conflict?
If you don't install the residents, no.

I was told before that drivers can cause problems even if they aren't running. I don't know... I might be wrong, it's just a thought.  :-\
Yes, some of them really cause problems. AVG, for instance. Others, maybe. I admit that for normal users, just one antivirus and firewall or, problems will come.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 05, 2005, 09:29:14 AM
Hey guys but i was told its a good idea to have both Avast and AntiVir on your computer just make sure you disable one of course. Go here.

http://www.download.com/Avast-Home-Edition/3640-2239_4-10375520.html?pn=5&sb=0&v=0

Just copy and past, read the first comment.
Title: Re: Avast is not good in detecting Trojans?
Post by: Spiritsongs on November 05, 2005, 06:25:05 PM
 :)  That 1st "Comment" in your link was too general and
      ambiguous; would NOT have Avast & AntiVir on the same
      computer .
      I agree with Eddy .

           For anti-trojan "protection", I use BOTH Avast & Ewido,
      the latter is available FREE from www.ewido.net/en
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 05, 2005, 08:59:40 PM
would NOT have Avast & AntiVir on the same computer
Not a trouble at all. Backup scanners are normal in a lot of computers.
I can only agree that you blame against this if it is suggested to all users.
If you know what's going on, second non-resident scanner won't make any hurt.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 06, 2005, 12:15:16 AM
:)  That 1st "Comment" in your link was too general and
      ambiguous; would NOT have Avast & AntiVir on the same
      computer .
      I agree with Eddy; and for an on-line scanner I choose
      RAV. For more info, see :

     www.ravantivirus.com/scan
     www.ravantivirus.com/scan/howto-scan.php

      For anti-trojan "protection", I use BOTH Avast & Ewido,
      the latter is available FREE from www.ewido.net/en

I uninstall Antivir. I got 2 questions: 1st: Since i had problems with NAV that not all stuff was uninstall therefore i had to use some tools to remove everything from NAV on my system, is everything off my computer from Antivir? 2st: I download the Ewido you mention, i have the Pro version free for 14 days, now when this is over and i go back to the free edition i wont get Real time protection?
Title: Re: Avast is not good in detecting Trojans?
Post by: DavidR on November 06, 2005, 12:44:58 AM
NAV and some other AVs leave stuff behind on uninstall. however, I haven't come across any posts about AntiVir leaving stuff behind, so I can't say for certain.

For the most part you only know when something is left behind is when avast complains or doesn't properly install because of the presence of these registry remnants. So if avast is working fine you are probably in the clear.
Title: Re: Avast is not good in detecting Trojans?
Post by: Spiritsongs on November 06, 2005, 02:52:11 AM
 :) When "removing" any program from my computer, I always
    follow the same 3 steps : 1) Uninstall thru Add/Remove
    Programs ; 2) Use my computer's "Search" feature, select-
    ing "All Files & Folders" and using the appropiate Search
   "term" and delete everything possible it finds ; 3) Use a
    SAFE Registry Cleaner, to remove entries there.
    Concerning Ewido : after the 14 day "trial" ends, you will
    no longer have "realtime protection" or "automatic
    updates" . Since their updates come out as frequently as
    Avast, should get them at least every 3 days. You may be
    interested in an "Ewido Quick Guide" available at :
    www.greyknight17.com/spy/Tutorials/EwidoQuickGuide.pdf
    One word of caution : Ewido may detect "Win32Heu...Dialer"
    as a "Moderate Risk" that is associated with your ISP ;
    just "Ignore" it as I did when it happened to me .
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 06, 2005, 06:18:45 AM
:) When "removing" any program from my computer, I always
    follow the same 3 steps : 1) Uninstall thru Add/Remove
    Programs ; 2) Use my computer's "Search" feature, select-
    ing "All Files & Folders" and using the appropiate Search
   "term" and delete everything possible it finds ; 3) Use a
    SAFE Registry Cleaner, to remove entries there.
    Concerning Ewido : after the 14 day "trial" ends, you will
    no longer have "realtime protection" or "automatic
    updates" . Since their updates come out as frequently as
    Avast, should get them at least every 3 days. You may be
    interested in an "Ewido Quick Guide" available at :
    www.greyknight17.com/spy/Tutorials/EwidoQuickGuide.pdf
    One word of caution : Ewido may detect "Win32Heu...Dialer"
    as a "Moderate Risk" that is associated with your ISP ;
    just "Ignore" it as I did when it happened to me .

Ok thanks, i will do things you said.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 06, 2005, 06:19:41 AM
So i just disable the resident scanner of AVG and i be fine?
No, NOT INSTALL which is different than disable.
After, you can set both AVG services to manual run (but you can let them to automatic).

How can use Install either AVG or Anti-Vir without the Resident Scanners?
Title: Re: Avast is not good in detecting Trojans?
Post by: StopMe on November 06, 2005, 07:02:48 AM
So i just disable the resident scanner of AVG and i be fine?
No, NOT INSTALL which is different than disable.
After, you can set both AVG services to manual run (but you can let them to automatic).

How can use Install either AVG or Anti-Vir without the Resident Scanners?

Been a while since I had AVG, but for Anti Vir, when downloading Anti Vir, they'll ask you if you want to enable Active Guard, make sure you say no or uncheck the Active Guard. 
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 06, 2005, 07:09:08 AM
So i just disable the resident scanner of AVG and i be fine?
No, NOT INSTALL which is different than disable.
After, you can set both AVG services to manual run (but you can let them to automatic).

How can use Install either AVG or Anti-Vir without the Resident Scanners?

Been a while since I had AVG, but for Anti Vir, when downloading Anti Vir, they'll ask you if you want to enable Active Guard, make sure you say no or uncheck the Active Guard. 

ok but lets say i do that i dont have to worry that i have 2 antivirus on my computer?
Title: Re: Avast is not good in detecting Trojans?
Post by: StopMe on November 06, 2005, 07:26:03 AM
If you only have one resident provider running, you can have another antivirus scanner such as Anti Vir.  :)
Title: Re: Avast is not good in detecting Trojans?
Post by: lakrsrool on November 06, 2005, 10:42:28 AM
Just a suggestion...  ;)

How about Clamwin as a backup scanner.  It doesn't even offer resident protection anyway.  Also it incorporates into Windows OS so that you can right click on files to scan individually just like Avast (and many other AV programs of course).

I have read that Clamwin is renown for updating the Virus signature DB very quickly and will update the Database (DB) as soon as a new virus signature is known.  I have also read that a lot of email server providers are now using the Clamwin Virus DB for their AV protection.

I have been thinking of adding this to my system.  I was wondering if there could be a conflict if both Avast and Clamwin are set to automatic updates for the AV DB?
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 06, 2005, 01:14:20 PM
I have been thinking of adding this to my system.  I was wondering if there could be a conflict if both Avast and Clamwin are set to automatic updates for the AV DB?
There is not such conflict. avast! and ClamWin can live together (if ClamWin is not set to scan emails, etc., anything, in background).
The automated update won't conflict for sure.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 06, 2005, 07:11:53 PM
Having 3 av's on 1 system is a overkill.
Why? You'll call me crazy as I have 6 backup scanners...

What 6 backup scanners you use?
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 06, 2005, 07:27:19 PM
What 6 backup scanners you use?
1. AVG
2. AntiVir
3. ClamWin
4. BitDefender
5. F-Prot DOS
6. NAV (old standalone on-demand scanner)
Title: Re: Avast is not good in detecting Trojans?
Post by: Culpeper on November 06, 2005, 07:42:45 PM
Seems over-redundant to have so many AV programs installed on a machine.  Wouldn't one be enough and use the popular online scanners that are available on the internet as so-called "back-up" scanners?
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 06, 2005, 07:58:42 PM
Seems over-redundant to have so many AV programs installed on a machine.  Wouldn't one be enough and use the popular online scanners that are available on the internet as so-called "back-up" scanners?
I have listen this a lot of times...
Testing software, not always on-line, off-line cleanning, compare features and detection, paranoid... a lot of reasons to keep my behavior.
Title: Re: Avast is not good in detecting Trojans?
Post by: Culpeper on November 06, 2005, 10:20:41 PM
Well Technical, I don't include you in this category.  You go above and beyond the call of duty to keep people fully informed on security issues and someone like yourself would need to install and test various platforms to stay informed.  I'm only referring to the average lay users. ;)
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 06, 2005, 11:09:03 PM
Well Technical, I don't include you in this category.  You go above and beyond the call of duty to keep people fully informed on security issues and someone like yourself would need to install and test various platforms to stay informed.  I'm only referring to the average lay users. ;)
Thanks Culpeper. Sorry if I misunderstood your first post.
I do agree that average users shouldn't ever think on having that in the same computer.
By the way, wasn't you using NOD32?  ::)
Title: Re: Avast is not good in detecting Trojans?
Post by: Culpeper on November 07, 2005, 03:18:06 AM
Well Technical, I don't include you in this category.  You go above and beyond the call of duty to keep people fully informed on security issues and someone like yourself would need to install and test various platforms to stay informed.  I'm only referring to the average lay users. ;)
Thanks Culpeper. Sorry if I misunderstood your first post.
I do agree that average users shouldn't ever think on having that in the same computer.
By the way, wasn't you using NOD32?  ::)

No, I'm in the lonely world of beta testing for Computer Associates.  Actually, I'm not doing it anymore but I still have about 18 months of updates and signature file downloads I can use.  That is on my XP machine.  Computer Associates is going through some type of weird transition what with using Zone Alarm, Pest Control and such not to mention they bought out Tiny Firewall.  The other machine has Suse Linux and there isn't much to worry about there as far as AV, spyware, and such.  Just Linux based iptables firewall and simple AV scanner is about all one needs for security.  Actually, Linux is very secure out of the box.  The bad guys prefer easier targets like Windows.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 07, 2005, 04:16:54 AM
What 6 backup scanners you use?
1. AVG
2. AntiVir
3. ClamWin
4. BitDefender
5. F-Prot DOS
6. NAV (old standalone on-demand scanner)

So it will be aright for me to have the first 5 on my computer?
Title: Re: Avast is not good in detecting Trojans?
Post by: Culpeper on November 07, 2005, 04:33:11 AM
I think if you install all those av programs on your machine you are going to be greatly disappointed with the outcome.  Unless you are above novice level on windows OS.  I may have missed something here but is there a reason why you want so many different scanners on one machine?
Title: Re: Avast is not good in detecting Trojans?
Post by: StopMe on November 07, 2005, 04:44:11 AM
What 6 backup scanners you use?
1. AVG
2. AntiVir
3. ClamWin
4. BitDefender
5. F-Prot DOS
6. NAV (old standalone on-demand scanner)

So it will be aright for me to have the first 5 on my computer?

Its best for you just have just one resident Anti virus and one back up scanner cause having a whole lot of yum wouldn't be good on the computer.  This is Tech's way of keeping safe from Viruses, but not everyone can have a 6 different scanners and still have a peaceful computer.   ;)
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 07, 2005, 04:45:39 AM
I think if you install all those av programs on your machine you are going to be greatly disappointed with the outcome.  Unless you are above novice level on windows OS.  I may have missed something here but is there a reason why you want so many different scanners on one machine?

I heard that not one Antivirus catch everything. Right now i only Running Avast with resident scanner and AntiVir without the resident scanner. And a Anti-Torjan called Ewido and only for a on-demand scanner.
Title: Re: Avast is not good in detecting Trojans?
Post by: StopMe on November 07, 2005, 04:59:05 AM
With those three on your PC, you should be fine.   8)
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 07, 2005, 05:10:41 AM
With those three on your PC, you should be fine.   8)

Thanks, do you know which one is better to have as a backup, AVG or AntiVir? I like AntiVir but i want to know if AVG is better.
Title: Re: Avast is not good in detecting Trojans?
Post by: StopMe on November 07, 2005, 05:35:40 AM
Just stick with Anti Vir and you should be fine.  Haven't been with AVG for a while now, but Anti Vir is good enough.   :)
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 07, 2005, 01:10:50 PM
This is Tech's way of keeping safe from Viruses, but not everyone can have a 6 different scanners and still have a peaceful computer.   ;)
Sure. But I don't keep me safe with them. My protection is avast, the only resident.
The others are for test purposes, backup scanner, learning, features comparison to make suggestions to avast!, etc.
For sure, don't have all of them for security reasons.

As backup scanner, an order for me would be:
1. ClamWin
2. AntiVir
3. BitDefender
4. AVG
5. F-Prot DOS

Taking in account the hability of update and the detection (at least for me).
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 07, 2005, 11:08:11 PM
This is Tech's way of keeping safe from Viruses, but not everyone can have a 6 different scanners and still have a peaceful computer.   ;)
Sure. But I don't keep me safe with them. My protection is avast, the only resident.
The others are for test purposes, backup scanner, learning, features comparison to make suggestions to avast!, etc.
For sure, don't have all of them for security reasons.

As backup scanner, an order for me would be:
1. ClamWin
2. AntiVir
3. BitDefender
4. AVG
5. F-Prot DOS

Taking in account the hability of update and the detection (at least for me).

How about having F-Prot Dos on my system? I only have AntiVir as a backup, Ewido just detects Trojans and stuff. And whats more effective to have Web Shield in Normal or High? and what happends if i dont use intelligent stream scanning of the Web shield?
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 08, 2005, 12:50:48 AM
How about having F-Prot Dos on my system?
I heard a lot about F-Prot... for me, after all this time, don't worth to have it as a backup scanner. Difficult to update (need a third party) and detects nothing, even when I'm absolutely sure about the infection.
Title: Re: Avast is not good in detecting Trojans?
Post by: AvastForever on November 08, 2005, 02:28:21 AM
How about having F-Prot Dos on my system?
I heard a lot about F-Prot... for me, after all this time, don't worth to have it as a backup scanner. Difficult to update (need a third party) and detects nothing, even when I'm absolutely sure about the infection.

Thanks. and And whats more effective to have Web Shield in Normal or High? and what happends if i dont use intelligent stream scanning of the Web shield?
Title: Re: Avast is not good in detecting Trojans?
Post by: Culpeper on November 08, 2005, 03:51:35 AM
My experience with F-Prot for DOS has been very good. It's a command line scanner so you only need an internet connection and an open DOS command prompt to udpate and scan.  Same thing with the F-Prot Linux version.  Also, F-Prot for DOS is great for Win98 and Avast! since Avast doesn't scan the boot sector on boot up and F-Prot for DOS will.  All you need is a batch file to scan the boot sector and root directory with F-Prot on startup and Avast! runs after that in Windows GUI.  Worked great for me when I was using Avast! with Win98.
Title: Re: Avast is not good in detecting Trojans?
Post by: Lisandro on November 08, 2005, 11:55:48 AM
Thanks. and And whats more effective to have Web Shield in Normal or High? and what happends if i dont use intelligent stream scanning of the Web shield?
If you search intelligent stream in the board you'll find something.
You can use full WebShield power clicking 'Control' in my signature and using AEC option to it.