Change back to "Unknown Application"


  1. Posts : 39
    Windows 7 Home Premium 64bit SP1
       #1

    Change back to "Unknown Application"


    I was looking at the content of some .ui file types using the "open with" command and then selecting Notepad. Unfortunately I accidentally had the box ticked to open all files of this type with Notepad from now on.

    The files were originally designated as being opened with an "unknown application". I can set these files to be opened by default with any program, but as it is not on the list how do I change it back to open with "unknown application"?

    I know it's no big deal and it can stay that way without any problem , but things like that can annoy me at times

    Any advice appreciated , thanks.

    SFM
      My Computer


  2. Posts : 71,977
    64-bit Windows 11 Pro for Workstations
       #2

    Hello SFM,

    If you like, you can download and merge the .reg file I attached below to unassociate that file extension. It will delete the common registry entries for the file extension to unassociate it. You may need to log off and log on to fully apply.

    Hope this helps,
    Shawn
    Change back to "Unknown Application" Attached Files
      My Computer


  3. Posts : 8,608
    Windows 7 Ultimate 32bit SP1
       #3

    What application? Many here .UI file types:
    Google
    Just uncheck the 'open with' (right click) and then "choose from" to open them
      My Computer


  4. Posts : 39
    Windows 7 Home Premium 64bit SP1
    Thread Starter
       #4

    Thank you both for your replies.

    Shawn, your solution worked well and now all is back to normal again.

    Regards

    SFM
      My Computer


  5. Posts : 71,977
    64-bit Windows 11 Pro for Workstations
       #5

    You're most welcome SFM. I'm happy to hear that you got it sorted. :)
      My Computer


  6. Posts : 165
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
       #6

    Won't work for me (!?)


    Brink; I did exactly the same thing only while in the SYSTEM 32 folder.
    Tried the 'fix' , opened it, Merged it , clicked yes, then OK, rebooted, and still have the files opening with Wordpad.
    Dumb mistake admittedly... but that aside, am I missing something?
    Thanks
      My Computer


  7. Posts : 71,977
    64-bit Windows 11 Pro for Workstations
       #7

    Hello Idahjo,

    Please go ahead and create a new thread with all of the details about your issue instead since it may not be exactly the same issue as the OP here. :)
      My Computer


  8. Posts : 165
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
       #8

    Thanks Brink for your usual prompt reply. I was going back to delete my post as I found a system copy and reloaded it. All OK now and I will not be doing that dumb stunt again
    I changed the HD that I thought I had my system images on and just located this one. Sorry I did not catch the post in time to delete it.
    Thanks again..
      My Computer


  9. Posts : 71,977
    64-bit Windows 11 Pro for Workstations
       #9

    No problem. I'm happy that you got it sorted. :)
      My Computer


  10. Posts : 1
    windows 7 ultimate x64 bit
       #10

    hey brink,

    does it work the same with the .tmp file,

    pls, help me as i have changed the default program to hp solution center program.

    I have already downloaded the other reg file you uploaded and merged it by changing its name to Default_tmp.reg i can,t find any changes, does this merge has any affect on other files.
      My Computer


 

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