Q&A What is Smartscreen? (Win8/10)

Discussion in 'Microsoft' started by Umbra, Apr 1, 2016.

?

Do you use it ?

  1. Yes

    45 vote(s)
    86.5%
  2. No because...

    7 vote(s)
    13.5%
  1. HarborFront

    HarborFront Level 34
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    You try that foobar 2000 and see with internet disconnected.
     
  2. Andy Ful

    Andy Ful Level 22

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    What is the point of using the stationary telephone, if sometimes there is no power?
     
  3. Andy Ful

    Andy Ful Level 22

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    I am afraid that Foobar has not got EV certificate. This is a very special (high quality) kind od digital signing.
     
  4. jamescv7

    jamescv7 Level 61
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    Typically the Smartscreen scans for digital signature alongside of reputation result when online, so if no alerts occurred then it passed on the criteria hence ready for execution.

    Possible it checks also from current digital publishers if exist in the system.

    Yes by context, the concept of IE/Edge browser is same on Windows OS feature. I've encountered Smartscreen yesterday on my classmate's laptop.

    Although it may scan possible from current certificates in the system.

    Basically the Smartscreen already downloaded some temporary cache to checked for results of a file.

    A pop-up like 'cannot checked right now' is because of digital signature that may not present in the system.
     
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  5. reboot

    reboot Level 3

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    What is the definition of 100% cloud-based?
     
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  6. Andy Ful

    Andy Ful Level 22

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    I do not think that such definition exists. But, for our discussion, it could mean that SmartScreen cannot check the file without Internet connection with Reputation Cloud.
     
  7. Umbra

    Umbra From Emsisoft
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    you supposed to be online then:
    - no message = safe
    - message = unknown or malicious (then WD would surely popup)
     
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  8. reboot

    reboot Level 3

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    Thanks Andy. I think that is a workable definition for the sake of this thread. :) I must be getting old because some questions just fry my brain. Like trying to answer the question... When does smell become taste?
     
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  9. Spawn

    Spawn Administrator
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    Jan 8, 2011
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    In my opinion:

    An application that requires a permanent always-on connection, as with Super Mario Go, and Steam (without Offline mode). SmartScreen's fail-safe is the No Internet access warning.
     
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  10. Andy Ful

    Andy Ful Level 22

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    I would like to test it. Could you give some examples, please.
     
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  11. reboot

    reboot Level 3

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    If one excludes folders and files in Windows Defender what impact if any does that have on SmartScreen?
     
  12. Umbra

    Umbra From Emsisoft
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    good question , i never tried, maybe you can do , and tell us :D
     
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  13. shmu26

    shmu26 Level 53

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    Let's say I downloaded a file with google chrome or an email client, and then I execute it. What file types will trigger smartscreen blocking? Will it block downloaded scripts?

    And what happens if I download a zip file with a torrent client?
     
  14. reboot

    reboot Level 3

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    Shoot! I was kinda hoping that Andy would do it for me. :) @Andy Ful Where are you when I need you?
     
  15. Umbra

    Umbra From Emsisoft
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    as i said above , you will know by testing it and tell us your result :D
     
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  16. Andy Ful

    Andy Ful Level 22

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    No impact on SmartScreen, I think. SmartScreen App Reputation on Run works even with disabled WD. But, the excluded files should open quicker.
     
  17. Andy Ful

    Andy Ful Level 22

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    @shmu26
    I am afraid you missed my post #32 in this thread. Please read it first. I am sure it will help a lot. If you will have some concern, I'm here for you.:)
     
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  18. Umbra

    Umbra From Emsisoft
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    raaaaaah @Andy Ful you gave him the solution too fast :p
     
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  19. shmu26

    shmu26 Level 53

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    thanks!
    so smartscreen won't work with a torrented file, and even if downloaded by browser, it might or might not work, after a zipped file is unzipped.

    and what about a regular, unzipped script file, that is downloaded by a non-microsoft browser?
    I don't think you covered that point. Maybe I missed it?
     
  20. Andy Ful

    Andy Ful Level 22

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    It does not matter what popular browser is used to download ZIP file. It always gets :
    [ZoneTransfer]
    ZoneId=3

    The problem arises, when the file is uzipped. Windows builtin unzip function, can transfer

    [ZoneTransfer]
    ZoneId=3

    to unzipped files.
     
    shmu26 likes this.
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