File Extension Type - Unassociate

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    File Extension Type - Unassociate

    File Extension Type - Unassociate

    How to Unassociate File Extension Types in Vista, Windows 7, and Windows 8
    Published by
    Designer Media Ltd


    How to Unassociate File Extension Types in Vista, Windows 7, and Windows 8

       Information
    This tutorial will show you how to unassociate a file extension to no longer have a default program to open it with afterwards in Vista, Windows 7, and Windows 8.

    You must be logged in as an administrator to be able to unassociate file types.

       Note
    These are free standalone EXE program that run without installing anything on your computer.


    CONTENTS:
    • Option One: Unassociate File Type using "FileTypesMan" Program
    • Option Two: Unassociate File Type using "Unassociate File Types" Program
    • Option Three: Unassociate File Type using "Unassociate" BAT file



    OPTION ONE

    Unassociate File Type using "FileTypesMan" Program


    NOTE: This program supports running in XP, Vista, Windows 7, and Windows 8.
    1. Download the ZIP file for the same 32-bit or 64-bit FileTypesMan at the bottom of the site below as your 32-bit or 64-bit Windows.
    2. Open the downloaded filetypesman.zip or filetypesman-x64.zip, and extract (drag and drop) all files to the desktop.

    3. Run the extracted FileTypesMan.exe file.

    4. If prompted by UAC, click/tap on Yes (Windows 7/8) or Continue (Vista).

    5. In the top pane, select one or more "extensions" (ex: .txt) that you wish to unassociate. (see screenshot below)

       Note
    To select random multiple file extensions:
    Press and hold the Ctrl key while clicking on extensions to select them, then release the Ctrl key when finished.

    To Select everything inbetween two selected file extensions including the selected file extension:
    Select an extension, press and hold the Shift key, click on another extension to select them and everything inbetween them, then release the Shift key.

    File Extension Type - Unassociate-filetypesman-1.jpg
    6. When finished with step 5, click/tap on Edit (menu bar) and Delete Selected Extensions. (see screenshot below)
    File Extension Type - Unassociate-filetypesman-2.jpg
    7. Click/tap on Yes to confirm. (see screenshot below)

    8. When finished, you can close FileTypesMan if you like.



    OPTION TWO

    Unassociate File Type using "Unassociate File Types" Program


    NOTE: This program only supports running in Windows 7 and Vista. Windows 8 is not supported.
    1. Download the ZIP file for the free Unassociate File Types program under Attachements towards the bottom of the site at the link, and save it to your desktop.

    2. Open the downloaded unassoc.zip, and extract (drag and drop) all files to the desktop. (see screenshot below)
    File Extension Type - Unassociate-zip_contents.jpg
    3. Run the extracted Unassoc.exe file.

    4. If prompted by UAC, click/tap on Yes (Windows 7) or Continue (Vista).

    5. To Unassociate a File Extension Type
    A) Click/tap on a file extension type from the list in the left pane to select it. (see screenshot below step 7)

    B) Click/tap on Remove file association (User). (see screenshot below step 7)
    6. To Delete a File Extension Type
    A) Click/tap on a file extension type from the list in the left pane to select it. (see screenshot below step 7)

    B) Click/tap on Delete file type. (see screenshot below step 7)
    7. When finished, close the program.
    File Extension Type - Unassociate-unassociate.jpg



    OPTION THREE

    Unassociate File Type using "Unassociate" BAT file


       Note
    Thank you to our member Pyprohly for creating the Unassociate.bat file in this option.


    1. Click/tap on the Download button below to download the Unassociate.bat v2.2.1 file.
    2. Save the .bat file to your desktop, and unblock it.

    3. Do step 4 or step 5 below for how you want to unassociate a file type with the Unassociate.bat file.

    4. Drag and drop the file you want to unassociate on to the Unassociate.bat file, and go to step 7 below. (see screenshot below)
    File Extension Type - Unassociate-unassociate_drag.png
    5. Right click on the Unassociate.bat file, and click on Run as administrator.

    6. Enter the file extension that you want to unassociate, and press Enter. (see screenshot below)
    File Extension Type - Unassociate-unassociate-1.png
    7. Type Y to confirm. (see screenshot below)
    File Extension Type - Unassociate-unassociate-2.png
    8. The entered file extension is now unassociated for all users. (see screenshot below)
    File Extension Type - Unassociate-unassociate-3.png
    That's it,
    Shawn








  1. Posts : 83
    Microsoft Windows 7 64-bit Service Pack 1
       #1

    I can't seem to unassociate .BAK files. Do I use the delete feature?
      My Computer


  2. Posts : 70,367
    64-bit Windows 10 Pro
    Thread Starter
       #2

    Hello TONPumper,

    You could download and merge the bak option in the tutorial below that will unassociate for you automatically if you like.

    Default File Type Associations - Restore

    Hope this helps,
    Shawn
      My Computer


  3. Posts : 11
    Windows 7 Ultimate
       #3

    Thanks man :)
      My Computer


  4. Posts : 70,367
    64-bit Windows 10 Pro
    Thread Starter
       #4

    You're most welcome Ghost. :)
      My Computer


  5. Posts : 11
    Windows 7 Ultimate
       #5

    Brink said:
    You're most welcome Ghost. :)

    man i have files which has extension ".sis.dm" i'm not able to find this extension in the app list

    anyway to do it ??
      My Computer


  6. Posts : 70,367
    64-bit Windows 10 Pro
    Thread Starter
       #6

    Do you have a .dm file extension listed instead? That would be the actual file extension instead of .sis.dm. Only the letters after the the last dot is the file extension.
      My Computer


  7. Posts : 11
    Windows 7 Ultimate
       #7

    Brink said:
    Do you have a .dm file extension listed instead? That would be the actual file extension instead of .sis.dm. Only the letters after the the last dot is the file extension.

    uh i got it
    there is a .dm extension listed, but when i selected the remove file associations (user) button is inactive :S
      My Computer


  8. Posts : 70,367
    64-bit Windows 10 Pro
    Thread Starter
       #8

    I attached a REG file below that will remove the .dm file extension from the usual locations in the registry that should also unassociate it. After merging the REG file, restart the computer to fully apply.
    File Extension Type - Unassociate Attached Files
      My Computer


  9. Posts : 11
    Windows 7 Ultimate
       #9

    done :))
    Thanks Brink
      My Computer


 
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