"Single-Scan" Guards?

Hi,

assuming you're using Avira Anti-Virus as on-access guard, run an application two times
one after another, in both cases the file will be scanned.

Now I'm looking for an AV product that scans the file only once.
I believe Kaspersky on-access re-scans already scanned files only after they changed, right?
What other products behave like this?

 

Rising AV free or paid has the option to skip files found clean earlier -- on demand and realtime -- and a version of F-Prot 6 had that feature. Twister has that feature. Dunno about Avast but you can configure AntiVir 9 to skip the files too.

Dave

 

You can configure Avast to where it will not scan already scanned files until definitions are updated or until the file has changed.

 

avast! 5 does

 

Can you tell me more? How or where do you enable this feature?

 

This is the so called smart-mode; KAV and Dr Web use this and Avast 5 beta has both a Transient and Persistent Cache mode.

 

Thanks so far. Think I'll give Avast a try.


What's with NOD32?

 

This method is not good for your security? New signatures might detect your "clean" file as infected...

 

It is good for your security (is that what the "?" means?) - unless the new detection is an FP.

 

I am sorry, I am lost. Just ignore my post. I am not expert like you.

 

I believe I understand what you meant. The answer should be 'NO'. Unless your previously "clean" files were infected by zero-day malware that went undetected or was without a signature.

Unless they have a FP, of course.

 

That is why Avast has two levels

a) signed programs are handled by the persistant cache

b) unsigned clean programs are handled by the transiniant cache and will be re-scanned after a virus data base update, so a previously clean file will be detected after data base update

Avast chache works superb, s

Cheers Kees