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  1.    1 Week Ago #1
    Join Date : Jul 2015
    Posts : 265
    Windows 10

    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 System SpecsSystem Spec

  2.    1 Week Ago #2
    Join Date : Jun 2016
    Posts : 16
    Windows 10

    Looks about right, lol. Yes, it's safe to run it.
      My System SpecsSystem Spec

  3.    1 Week Ago #3
    Join Date : Oct 2014
    New Jersey
    Posts : 502
    Windows 7 Professional x64 Service Pack 1

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

    It`s that new file system.
      My System SpecsSystem Spec

  4.    1 Week Ago #4
    Join Date : Jan 2014
    Walnut Beach, Milford, Ct
    Posts : 16,280
    Win10 Pro / Remix 3.0

    Mine was exactly the same, I let it remove all of it.
      My System SpecsSystem Spec

  5.    1 Week Ago #5
    Join Date : Jun 2015
    Posts : 988
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)

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

  6.    1 Week Ago #6
    Join Date : Jul 2015
    Posts : 657
    Windows 10 Home x64

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

  7.    1 Week Ago #7
    Join Date : Mar 2016
    Posts : 59
    win 10 HOME

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

      My System SpecsSystem Spec

  8.    1 Week Ago #8
    Join Date : Feb 2015
    Bamberg Germany
    Posts : 12,510
    Windows 10 Pro 64-bit / Ubuntu & Windows 8.1 in Hyper-V

    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
      My System SpecsSystem Spec

  9.    1 Week Ago #9
    Join Date : Aug 2016
    S/E England
    Posts : 531
    Windows 10 Home x64 (1607)

    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 System SpecsSystem Spec

  10.    1 Week Ago #10
    Join Date : Jul 2015
    Posts : 265
    Windows 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 System SpecsSystem Spec

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