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


  2. Join Date : Jun 2016
    Posts : 16
    Windows 10
       12 Oct 2016 #2

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


  3. Join Date : Oct 2014
    New Jersey
    Posts : 626
    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 System SpecsSystem Spec


  4. Join Date : Jan 2014
    Walnut Beach, Milford, Ct
    Posts : 17,300
    Win10 Pro / Remix 3.0
       12 Oct 2016 #4

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


  5. Join Date : Jun 2015
    UK
    Posts : 1,125
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)
       13 Oct 2016 #5

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


  6. Join Date : Jul 2015
    Posts : 705
    Windows 10 Home x64
       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 System SpecsSystem Spec


  7. Join Date : Mar 2016
    Posts : 73
    win 10 HOME
       13 Oct 2016 #7

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

    DME
      My System SpecsSystem Spec


  8. Join Date : Feb 2015
    Bamberg Germany
    Posts : 13,361
    Microsoft Windows 10 Pro 64-bit 14393 Multiprocessor Free
       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
      My System SpecsSystem Spec


  9. Join Date : Aug 2016
    S/E England
    Posts : 794
    Windows 10 Home x64 (1607)
       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 System SpecsSystem Spec


  10. Join Date : Jul 2015
    Posts : 265
    Windows 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 System SpecsSystem Spec


 
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