Windows 10: Scary Windows 10 disk cleanup. Should I run it.

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  1.    12 Oct 2016 #1

    Scary Windows 10 disk cleanup. Should I run it.

    One day after the latest update, computer is running fine, I then ran the built-in disk cleanup including system cleanup and here's what I got.

    Windows Update Cleanup 3.99 TB holy cow.

    My total drive is using about 40 GB, I wonder where this 3.99TB is located.
    Click image for larger version. 

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      My ComputerSystem Spec

  2.    12 Oct 2016 #2

    Looks about right, lol. Yes, it's safe to run it.
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  3. AddRAM's Avatar
    Posts : 2,110
    Windows 7 Pro x64 Windows 10 Pro x64
       12 Oct 2016 #3

    Mine showed the same thing when I ran it the 1st time

    It`s that new file system.
      My ComputersSystem Spec

  4. COMPUTIAC Guest
       12 Oct 2016 #4

    Mine was exactly the same, I let it remove all of it.
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  5.    13 Oct 2016 #5

    Yes, I had the same on 2 PCs. It.s safe to disk cleaner and recover the space.
      My ComputersSystem Spec

  6.    13 Oct 2016 #6

    It seems to be a quirk with latest 321 build. On an older AMD Phenom it just rebooted spontaneusly when running it.
      My ComputerSystem Spec

  7.    13 Oct 2016 #7

    yes i seen the same on my toshiba sat and it really bothered me glad of sorry ? im not alone

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  8. Cliff S's Avatar
    Posts : 21,728
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       13 Oct 2016 #8

    Opening up an admin prompt and pasting this in: Dism.exe /Online /Cleanup-Image /AnalyzeComponentStore will get rid of it faster than Windows Update Cleanup(at least it did for me).
    Cumulative Update KB3194798 for Windows 10 PC Mobile build 14393.321 - Page 8 - Windows 10 Forums
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  9. Bree's Avatar
    Posts : 8,847
    10 Home x64 (1809) (10 Pro on 2nd pc)
       13 Oct 2016 #9

    Scared me too the first time I saw this back in August. That's when I found the explanation (which Cliff S quotes in the above linked post). It's safe to let Disk Clean-up run, but @Cliff S's method is a neater and faster solution.

    @EdTittel has also picked up on my post and explained in far more detail than I could how this can happen.

    Thanks, Bree for the explanation and resource. It provided the inspiration for my blog post today.
    Windows Update Clean-up files 3.99TB
      My ComputersSystem Spec

  10.    13 Oct 2016 #10

    Really helpful responses. Thanks guys. My cleanup took about 15 minutes of sheer agony. But after restart all is well.

    This forum is awesome, learn something new every day.
      My ComputerSystem Spec

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