"App & browser control" is Off warning


  1. Posts : 565
    Windows 10 Professional 64-bit
       #1

    "App & browser control" is Off warning


    Yesterday I upgraded to v2004 on both my desktop PC and my DELL laptop. In both cases things seemed to go well but I now see a "Windows Security" warning that was not there in the previous version v1909. See picture: -
    "App & browser control" is Off warning-app-browser-control.png

    If it was important I reckon Microsoft should have turned it on by default but maybe this is a Windows 10 bug? I suppose if I do not turn it on then MS warning will remain in place until I turn it on but will it cause problems if I do? I suppose it will be easy to turn it off again. Has anyone else had this with v2004?

    Thanks

    - - - Updated - - -

    I should add that on both devices I have Norton Security installed and is showing as 'On' including firewall.
      My Computers


  2. Posts : 3,257
    Windows 10 Pro
       #2

    If microsoft went an willy nilly changed security settings without your knowledge, they would have worse problems...

    Alerting you to it is the correct way to go about it.
      My Computer


  3. Posts : 1
    Windows 10 Pro
       #3

    I am a freelance network administrator.......this setting is *constantly* turning itself off on hundreds of Windows 10 v2004 computers that I manage. If I manually turn it back on, it will soon be turned off again. I am not sure when it turns itself back off again (if after a restart, or log-off, or whatever). I am just here to say that the OP is not alone, and this issue is occurring super-frequently, on *many* PCs, and therefore I am really surprised that I can't find much around the Internet about this issue (besides this thread)!
      My Computer


  4. Posts : 4,550
    Windows 11 Pro 64-bit
       #4

    Can you check and see which protections setting is turn off?
      My Computer


  5. Posts : 27,197
    Windows 10 (Pro and Insider Pro)
       #5

    brianchris said:
    I am a freelance network administrator.......this setting is *constantly* turning itself off on hundreds of Windows 10 v2004 computers that I manage. If I manually turn it back on, it will soon be turned off again. I am not sure when it turns itself back off again (if after a restart, or log-off, or whatever). I am just here to say that the OP is not alone, and this issue is occurring super-frequently, on *many* PCs, and therefore I am really surprised that I can't find much around the Internet about this issue (besides this thread)!
    The option that was turned off was detecting PUPs (potentially unwanted programs). That was after the upgrade to newer build this spring, which included that option in settings. Before that, it was quite hidden, and nobody noticed it. Not critical.

    Once it is set, it should stick.

    Same option at your computers?
      My Computers


  6. Posts : 946
    Win10 Version 21H2 19044.1645
       #6

    wiganken said:

    Has anyone else had this with v2004?

    .

    Yes, had the same. Just turn back on.
      My Computer


  7. Posts : 25,054
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #7

    brianchris said:
    I am a freelance network administrator.......this setting is *constantly* turning itself off on hundreds of Windows 10 v2004 computers that I manage. If I manually turn it back on, it will soon be turned off again. I am not sure when it turns itself back off again (if after a restart, or log-off, or whatever). I am just here to say that the OP is not alone, and this issue is occurring super-frequently, on *many* PCs, and therefore I am really surprised that I can't find much around the Internet about this issue (besides this thread)!
    Welcome to Ten Forums. This setting in App & Browser control to block PUAs is new for 2004, but the ability to block PUAs has been part of Windows 10 Defender for more than four years. Up until 2004 it has only been on by default on Enterprise domains, though it could be enabled in all editions from Home up by a registry edit. 2004 makes available to all through Windows Security setting.

    For a personal machine this Potentially Unwanted Apps setting, once turned on, will stay turned on. But your "*many* PCs" are most likely members of a Domain. I suspect it's a Domain-wide Group Policy that is turning it off on these machines each time a user signs in.

    It would be no surprise me if a Group Policy that was appropriate for versions up to 1909 is to blame. I know from personal experience that on my 1909 machines with PUA enabled in the registry, after upgrading to 2004 the 'Potentially unwanted app blocking' switch is ON but greyed out, with a 'This setting is managed by your administrator' message above it. The registry changes that were appropriate in 1909 need to be undone after upgrading to 2004.

    Enable or Disable Microsoft Defender PUA Protection in Windows 10 - post #64
    Last edited by Bree; 04 Sep 2020 at 16:12.
      My Computers


  8. Posts : 565
    Windows 10 Professional 64-bit
    Thread Starter
       #8

    As the OP I forgot to re-visit this thread in order to update it. Bad form, so here is the update: -
    I clicked on the "Dismiss" link and everything was OK and the "App & browser control" is showing "No actions needed" 2 1/2 months later so all sorted.
      My Computers


  9. Posts : 1
    Windows 10
       #9

    Common issue !


    I am still seeing this on around 50% of the PCs I work on. Why haven't Microsoft solved it yet ?
      My Computer


  10. Posts : 683
    Windows 10 x64
       #10

    wiganken said:
    As the OP I forgot to re-visit this thread in order to update it. Bad form, so here is the update: -
    I clicked on the "Dismiss" link and everything was OK and the "App & browser control" is showing "No actions needed" 2 1/2 months later so all sorted.
    I think the 'dismiss' only results in the exclamation mark not to show up again. But maybe the items behind them are not enabled, viz.
    Block apps
    Block downloads

    That again, it looks like these items are showing up, or not showing up, to depend on the Windows version used.
    19041.662 Outlook account: these items show up
    19042.662 Local account: these items show up
    19042.662 Outlook account: they don't show up

    But it could also be that 19042.662 Outlook account, there is still an exclamation mark, even though I wouldn't know what 'actions' I should take, as all items are enabled...

    "App & browser control" is Off warning-windows-10-potentially-unwanted-app-blocking-issue-01-06122020-072240.png

    =
    "App & browser control" is Off warning-windows-10-potentially-unwanted-app-blocking-issue-02-06122020-130822.png
    =
      My Computer


 

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