What is this large folder? Solved

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  1. f14tomcat's Avatar
    Posts : 42,184
    Triple boot - Win 10 Pro, Win 10 Pro Insider (2) - (and a sprinkling of VMs)
       #41

    Steve C said: View Post
    Thank you all for your help.

    The conclusion is that once you have enabled Application Guard you are left with several GB of useless files in C:\ProgramData\Microsoft\Windows\Containers even after disabling Application Guard. There appears to be no safe way of deleting the files.

    I'll file a feedback report and you never know Microsoft may get around to fixing their sloppy engineering.
    Thank you for doing the Feedback chore. Regret there is no apparent user solution.
    And Bree, for being the guinea pig.

    Cheers..............
      My ComputersSystem Spec

  2. Bree's Avatar
    Posts : 11,678
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #42

    Steve C said: View Post
    The conclusion is that once you have enabled Application Guard you are left with several GB of useless files in C:\ProgramData\Microsoft\Windows\Containers even after disabling Application Guard. There appears to be no safe way of deleting the files.

    I'll file a feedback report and you never know Microsoft may get around to fixing their sloppy engineering.
    I would like to reclaim those 'several GB' too. Do post an update if anything comes from your feedback report....
      My ComputersSystem Spec

  3. Bree's Avatar
    Posts : 11,678
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #43

    Take Two...


    Bree said: View Post
    I would like to reclaim those 'several GB' too. Do post an update if anything comes from your feedback report....
    OK, so I got impatient and thought I'd have another go. This time I managed to remove C:\ProgramData\Microsoft\Windows\Containers without killing my system. Well, the Start menu works, my VMs still run and I'm posting this from that machine. This may be overkill, but these were the steps I took...

    Uninstalled 'Windows Defender Application Guard' in 'Turn Windows features on or off' and restarted.

    Used Advanced start-up in Settings > Update & Security > Recovery to boot to a Command Prompt. CD into C:\ProgramData\Microsoft\Windows then used the command rmdir /s containers

    This removed most but not all files. There were a number of reports that 'The system cannot find the path specified', all in subfolders of the BaseImages folder.

    Code:
    containers\BASEIM~1\84C610~1\Files\Users\WDAGUtilityAccount\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\AC\AppCache\2TZYVOBF\1\C__Windows_SystemApps_Microsoft.Windows.Cortana_cw5n1h2txyewy_cache_Desktop_10[1].txt - The system cannot find the path specified.
    ...
     containers\BASEIM~1\84C610~1\Files\Windows\System32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\Microsoft-Windows-Security-SPP-Component-SKU-ProfessionalSingleLanguage-License-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cat - The system cannot find the path specified.

    Restarted and checked the size of Containers, it was now down to 260MB.

    In Regedit, deleted the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Containers (after checking that it didn't exist on the machine that had never had Application Guard) then restarted.

    In Advanced Security took ownership of Containers, granting myself Full Control at the same time, and ticking the boxes for 'Replace owner on subcontainers and objects' and 'Replace all child object permissions with inheritable permission entries from this object'.

    Used File Manager to delete C:\ProgramData\Microsoft\Windows\Containers. It reported that some file paths were too long to go into the Recycle bin, did I want to permanently delete them? (This may also explain the rmdir errors earlier).



    So far, everything seems to be working normally. Even SFC thinks the system is healthy.

    Click image for larger version. 

Name:	image.png 
Views:	47 
Size:	6.6 KB 
ID:	234100



    Postscript:

    Still working

    I have now made a new Macrium image of this 'slimmed down' system. Mounting it and the image I restored to start this process, I see that my C: drive has now gained 4.7GB extra free space.
    Last edited by Bree; 17 May 2019 at 20:33. Reason: Postscript
      My ComputersSystem Spec

  4.    #44

    Bree said: View Post
    OK, so I got impatient and thought I'd have another go. This time I managed to remove C:\ProgramData\Microsoft\Windows\Containers without killing my system. Well, the Start menu works, my VMs still run and I'm posting this from that machine. This may be overkill, but these were the steps I took...

    Uninstalled 'Windows Defender Application Guard' in 'Turn Windows features on or off' and restarted.

    Used Advanced start-up in Settings > Update & Security > Recovery to boot to a Command Prompt. CD into C:\ProgramData\Microsoft\Windows then used the command rmdir /s containers

    This removed most but not all files. There were a number of reports that 'The system cannot find the path specified', all in subfolders of the BaseImages folder.

    Code:
    containers\BASEIM~1\84C610~1\Files\Users\WDAGUtilityAccount\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\AC\AppCache\2TZYVOBF\1\C__Windows_SystemApps_Microsoft.Windows.Cortana_cw5n1h2txyewy_cache_Desktop_10[1].txt - The system cannot find the path specified.
    ...
     containers\BASEIM~1\84C610~1\Files\Windows\System32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\Microsoft-Windows-Security-SPP-Component-SKU-ProfessionalSingleLanguage-License-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cat - The system cannot find the path specified.

    Restarted and checked the size of Containers, it was now down to 260MB.

    In Regedit, deleted the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Containers (after checking that it didn't exist on the machine that had never had Application Guard) then restarted.

    In Advanced Security took ownership of Containers, granting myself Full Control at the same time, and ticking the boxes for 'Replace owner on subcontainers and objects' and 'Replace all child object permissions with inheritable permission entries from this object'.

    Used File Manager to delete C:\ProgramData\Microsoft\Windows\Containers. It reported that some file paths were too long to go into the Recycle bin, did I want to permanently delete them? (This may also explain the rmdir errors earlier).



    So far, everything seems to be working normally. Even SFC thinks the system is healthy.

    Click image for larger version. 

Name:	image.png 
Views:	47 
Size:	6.6 KB 
ID:	234100



    Postscript:

    Still working

    I have now made a new Macrium image of this 'slimmed down' system. Mounting it and the image I restored to start this process, I see that my C: drive has now gained 4.7GB extra free space.
    Thanks - I'll try that method in a few days if nobody reports any problems
      My ComputersSystem Spec

  5. Bree's Avatar
    Posts : 11,678
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #45

    Steve C said: View Post
    Thanks - I'll try that method in a few days if nobody reports any problems

    Well, mine's still working OK. I don't think there's a large sample base to hear from, just you and me were mad enough to try Application Guard by the looks of it


    There may be more come the release of 1903, seems the new Sandbox feature uses the same Containers function.
      My ComputersSystem Spec

  6.    #46

    Nice work, @Bree: as so often is the case you took my idle musings in reading over the thread (along the lines of "why not try force deleting from alternate boot media?") and turned them into useful practice. Please: keep up the good work!
    Best wishes,
    --Ed--
      My ComputersSystem Spec


  7. Bree's Avatar
    Posts : 11,678
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #47

    EdTittel said: View Post
    Nice work, @Bree: as so often is the case you took my idle musings in reading over the thread (along the lines of "why not try force deleting from alternate boot media?") and turned them into useful practice. Please: keep up the good work!
    Thanks. After the first attempt which went wrong it seemed the obvious next step. Deleting the registry key may well have been crucial too.

    As I said, I probably took more precautions than were strictly necessary, but as it worked I'm not inclined to restore the original image and try to refine the process
      My ComputersSystem Spec

  8.    #48

    @Bree: indeed, one of the hardest lessons for inveterate tinkers to learn is "If it ain't broke, don't fix it!" Again: keep up the good work.
    --Ed--
      My ComputersSystem Spec

  9.    #49

    Bree said: View Post
    OK, so I got impatient and thought I'd have another go. This time I managed to remove C:\ProgramData\Microsoft\Windows\Containers without killing my system. Well, the Start menu works, my VMs still run and I'm posting this from that machine. This may be overkill, but these were the steps I took...

    Uninstalled 'Windows Defender Application Guard' in 'Turn Windows features on or off' and restarted.

    Used Advanced start-up in Settings > Update & Security > Recovery to boot to a Command Prompt. CD into C:\ProgramData\Microsoft\Windows then used the command rmdir /s containers

    This removed most but not all files. There were a number of reports that 'The system cannot find the path specified', all in subfolders of the BaseImages folder.

    Code:
    containers\BASEIM~1\84C610~1\Files\Users\WDAGUtilityAccount\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\AC\AppCache\2TZYVOBF\1\C__Windows_SystemApps_Microsoft.Windows.Cortana_cw5n1h2txyewy_cache_Desktop_10[1].txt - The system cannot find the path specified.
    ...
     containers\BASEIM~1\84C610~1\Files\Windows\System32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\Microsoft-Windows-Security-SPP-Component-SKU-ProfessionalSingleLanguage-License-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cat - The system cannot find the path specified.

    Restarted and checked the size of Containers, it was now down to 260MB.

    In Regedit, deleted the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Containers (after checking that it didn't exist on the machine that had never had Application Guard) then restarted.

    In Advanced Security took ownership of Containers, granting myself Full Control at the same time, and ticking the boxes for 'Replace owner on subcontainers and objects' and 'Replace all child object permissions with inheritable permission entries from this object'.

    Used File Manager to delete C:\ProgramData\Microsoft\Windows\Containers. It reported that some file paths were too long to go into the Recycle bin, did I want to permanently delete them? (This may also explain the rmdir errors earlier).



    So far, everything seems to be working normally. Even SFC thinks the system is healthy.

    Click image for larger version. 

Name:	image.png 
Views:	47 
Size:	6.6 KB 
ID:	234100



    Postscript:

    Still working

    I have now made a new Macrium image of this 'slimmed down' system. Mounting it and the image I restored to start this process, I see that my C: drive has now gained 4.7GB extra free space.
    All done now on my laptop using your method. I didn't need to take ownership of Containers after deleting the registry key and restarting.
      My ComputersSystem Spec

  10. Bree's Avatar
    Posts : 11,678
    10 Home x64 (1903) (10 Pro on 2nd pc)
       #50

    Steve C said: View Post
    All done now on my laptop using your method. I didn't need to take ownership of Containers after deleting the registry key and restarting.
    That's good to know, thanks. I did say I might have gone a bit overboard on the steps required.

    Oh, and still working fine, several reboots later
      My ComputersSystem Spec


 
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