Windows 8 and 8.1 Forums


Huge DriverStore and Huge WinSxS Directory

  1. #1


    Posts : 1
    Windows 8.1

    Huge DriverStore and Huge WinSxS Directory


    I noticed a large increase in my Windows Folder it is around 23.7 GB 5-6 GB larger than normal. I keep a close eye on files sizes as this is on a 64 GB SSD.
    After some searching around and making sure there are no downloads or restore points I ran CCleaner which I use religiously and windows cleaner with all options turned on. Still no luck.
    However I found what I think are the culprits.
    One. Windows\System32\DriverStore =8.06 GB to me this seems huge
    Two. Windows\WinSxS = 6.83 GB including 22,135 Folders with 92,138 files. Again seems excessive.
    Are these numbers excessively large?
    And is there anything I can do to reduce or remove them.
    Thanks any advice is greatly appreciated.

      My System SpecsSystem Spec

  2. #2


    Trnava
    Posts : 683
    Win 8.1.1 Pro x64


    Simply put, run this command: Dism.exe /Online /Cleanup-Image /StartComponentCleanup /ResetBase

    WinSxS Folder (Component Store) - Clean Up in Windows 8.1
      My System SpecsSystem Spec

  3. #3


    On my Win 8.1 Pro X64 system, DriverStore is 1.7GB. On my Win 10 X64 system it 780MB.

    8.06GB is extreme for sure.

    As for WinSXS, see here: How to see the actual size of the WinSxS folder in Windows 8.1

    Edit: Looks like displayed verses actual is a lot closer than I expectd. I was under the impression WinSXS had lots of hardlinks in it and not so many actual files, I was wrong:

    C:\WINDOWS\system32>Dism.exe /Online /Cleanup-Image /AnalyzeComponentStore

    Deployment Image Servicing and Management tool
    Version: 10.0.10049.0

    Image Version: 10.0.10049.0

    [==========================100.0%==========================]

    Component Store (WinSxS) information:

    Windows Explorer Reported Size of Component Store : 9.71 GB


    Actual Size of Component Store : 9.40 GB

    Shared with Windows : 7.98 GB
    Backups and Disabled Features : 999.95 MB
    Cache and Temporary Data : 420.58 MB

    Date of Last Cleanup : 2015-03-26 04:41:16

    Number of Reclaimable Packages : 0
    Component Store Cleanup Recommended : No
    Last edited by Ztruker; 05 Apr 2015 at 12:52.
      My System SpecsSystem Spec

  4. #4


    Quote Originally Posted by TairikuOkami View Post
    Simply put, run this command: Dism.exe /Online /Cleanup-Image /StartComponentCleanup /ResetBase

    WinSxS Folder (Component Store) - Clean Up in Windows 8.1
    Just found this:
    After running DISM with the “/ResetBase” parameter you cannot go back and uninstall previously installed updates…
    Not sure how much of a concern this should be.
      My System SpecsSystem Spec

Huge DriverStore and Huge WinSxS Directory
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