"Single-Scan" Guards?

Discussion in 'other anti-virus software' started by cruchot, Dec 2, 2009.

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  1. cruchot

    cruchot Registered Member

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    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?
     
  2. dw2108

    dw2108 Registered Member

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    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
     
  3. dcrowe0050

    dcrowe0050 Registered Member

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

    Vladimyr Registered Member

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    avast! 5 does
     

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  5. cruchot

    cruchot Registered Member

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

    Blackcat Registered Member

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    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.
     
  7. cruchot

    cruchot Registered Member

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


    What's with NOD32?
     
  8. Technic

    Technic Registered Member

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

    Vladimyr Registered Member

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

    Technic Registered Member

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

    illicit Registered Member

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    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. :p
     
  12. Kees1958

    Kees1958 Registered Member

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    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
     
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