How do you revert a filetype back to unknown..?

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  1. Posts : 122
    Windows 7 Home Edition 64-bit
       #1

    How do you revert a filetype back to unknown..?


    Hi, I've accidently set another .cnf filetype to be known, as well. It's just so aggravating to see them have an icon as if they're good to open..how can I make them to open with nothing once again..?

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  2. Posts : 4,466
    Windows 10 Education 64 bit
       #2

    I believe you have to remove or edit the file type association that ties that file type to a program. if you type "file type" or "change file type" in the search bar you should find the place to do it.
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  3. Posts : 122
    Windows 7 Home Edition 64-bit
    Thread Starter
       #3

    I tried and it only wants me to specify a program, I can't leave it unknown..
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  4. Posts : 11,840
    64-bit Windows 8.1 Pro
       #4

    Default File Type Associations - Restore

    This will allow you to restore the default registry entries and program associations for the Windows 7 file extension type of your choice.
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  5. Posts : 1,035
    Vista 64 Ultimate, Windows 7 64 Ultimate, Ubuntu 9.10
       #5

    CNF is a Telnet Configuration File. The only association it has it to Telnet.
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  6. Posts : 122
    Windows 7 Home Edition 64-bit
    Thread Starter
       #6

    Ohk. I've got .sav and .CNF I'd like to restore to unknown. The .CNF are in all my PS1 games and .sav are some saves. The .CNF I had done by mistake, as I checked Properties and hit Enter thinking it was to hit Ok and made it for Adobe Reader..
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  7. Posts : 5,056
    Windows 7 x64 pro/ Windows 7 x86 Pro/ XP SP3 x86
       #7

    1) To remove a file type association, you can use a great utility found on winhelponline.com. It has a GUI.

    http://www.winhelponline.com/downloa...&articleId=231

    2) I believe you can do it from the command prompt also with the "assoc" command. See this page for complete instructions.

    How to Unassociate File Types and Remove File Extension Associations in Windows Vista » My Digital Life
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  8. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #8

    I've just subscribed to this thread in the hope that i will learn what it is all about. Anyone help me understand what "how can I make them to open with nothing once again" means. I'm a bit lost here!
    Last edited by mitchell65; 29 Jul 2010 at 08:00.
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  9. Posts : 1,180
    Windows 7 Ultimate
       #9

    mitchell65 said:
    I've just subscribed to this thread in the hope that i will learn what it is all about. Anyone help me understand what "how can I make them to open with nothing once again" means. I'm a bit lost here!
    You know when you try to open a file that Windows doesn't recognize, it asks you how you would like to open it by bringing up a list of programs to choose from? Well, OP would like to restore the file's behavior to that, right now it opens up with Adobe.
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  10. Posts : 5,440
    Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
       #10

    Kirsch said:
    mitchell65 said:
    I've just subscribed to this thread in the hope that i will learn what it is all about. Anyone help me understand what "how can I make them to open with nothing once again" means. I'm a bit lost here!
    You know when you try to open a file that Windows doesn't recognize, it asks you how you would like to open it by bringing up a list of programs to choose from? Well, OP would like to restore the file's behavior to that, right now it opens up with Adobe.
    Thank you, now I understand!
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