1.    20 Jan 2016 #1
    Join Date : Jan 2016
    Posts : 1
    Windows 8.1 64-bit (6.3, Build 9600)

    Disk Usage 100% despite great free space.

    Hi. Since yesterday, My laptop suddenly started lagging a lot. I opened Task Manager and saw that the Disk Usage was at 100%! The only things causing it to rise are the essential Windows Programs. This causes so much lag though, that if I try to run more than 1 application at a time, nothing starts responding and it forces Me to Force Shutdown manually by holding the power button. I tried a new Browser (went from Firefox to Chrome) and still the same problem. I decided I want to upgrade to Windows 10, since I'm qualified to have it free, but whenever I try to install it, the "Checking for Updates" loading bar never finishes and if I try to close it or anything else, it'll freeze up all over again. Please help!

    What should I do? I had to go into Safe Mode to be able to make an account here and type this up. I've already uninstalled some stuff, even though I barely have anything occupying a lot of space to begin with. I certainly didn't download anything malicious, as the day before it started lagging, it worked absolutely fine and haven't downloaded anything from then on.

    Thank You!
      My System SpecsSystem Spec

  2.    21 Jan 2016 #2
    Join Date : Jun 2015
    Posts : 10,399
    Windows 10 Pro / Windows 10 TP / Windows 8.1 Pro / Windows 7 Pro

    Disk Usage 100% despite great free space. Diagnostics Test Disk Usage 100% despite great free space.
     System File Check

    Please try following:
    • Open an admin command prompt
    • Copy/paste "sfc/scannow" (without quotes) and press enter
    • When it finished reboot your system
    • Open again an admin command prompt
    • Enter sfc/scannow again

    If sfc/scannow does NOT say "Windows Resource Protection did not find any integrity violation" after the second SFC, please upload the cbs.log file located at {windows partition}\Windows\Logs\CBS\, if the file is too large try a 3rd party uploader like dropbox, onedrive, google drive, mediafire etc.
    System File Check(SFC a.k.a. Windows Resource Protection) needs to have your system rebooted in order for sfc to try to fix the problems that it finds.
      My System SpecsSystem Spec

  3.    21 Jan 2016 #3
    Join Date : Nov 2015
    Posts : 299
    Win-10 Pro x64

    Hey Katzurp-
    I opened Task Manager and saw that the Disk Usage was at 100%!
    I did some checking and found THIS. It was written for Win-8.1, but I would assume there might be something that might offer some clues.

      My System SpecsSystem Spec


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