Unassociate File Extension Type

How to Unassociate a File Extension Type in Vista and Windows 7

information   Information
This will show you how to set a file extension to be associated with nothing for all users instead of some default program without having to delete the file extension unless you wanted to.

Note   Note
This is a standalone EXE program that does not install to your computer.

CREDIT TO:

Ramesh Srinivasan -www.winhelponline.com/articles/231/1/






Here's How:
1. Download the free unassoc.zip file and save it to your desktop.​
2. Right click on unassoc.zip (On Desktop) and click Open.​
3. Extract both files to the desktop. (See screenshot below)​
4. Click on the Unassoc.exe icon to run the program.​
NOTE: I would recommend that you put these two files in a new folder and save them in your C:\Program Files folder, then make a shortcut for the Unassoc.exe to use.
Zip_Contents.jpg

5. Click on Continue in the UAC prompt.​
6. To Unassociate a File Extension Type
A) Click on a file extension type from the list in the left pane to select it. (See screenshot below step 7)​
B) Click on Remove file association (User).​

7. To Delete a File Extension Type
A) Click on a file extension type from the list in the left pane to select it. (See screenshot)​
B) Click on Delete file type.​
Unassociate.jpg


8. Close program when done.​
That's it,
Shawn




 

Attachments

  • thumb_Default_Programs.png
    thumb_Default_Programs.png
    14.6 KB · Views: 477
Last edited by a moderator:
Hi, I have been trying desperately for 3 hours to remove the association of the file type .INS from the program "Inspiration" (Document Mapping) so that I can run an .INS file as an "install shield script" file. I tried your tutorial and, sure enough, in the control panel, the ".INS" file type is no longer associated with Inspiration. However, when I look at my downloaded copy of a new program that I want to install that includes the .INS file type, it is still associated with Inspiration! It is EVIL! Can you help me? Thanks!
 

My Computer

Hi Elisabeth,

Welcome to Vista Forums. :party:

If you installed a program that added the .INS extension, then you can reinstall it to add it back so you can unassociate it.

You can also right click on the .INS file and use Open With to select a EXE program to use to open it with.

http://www.vistax64.com/tutorials/69758-default-programs.html

Hope this helps,
Shawn
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
When I run the program and find the file I want to unassociate the Remove file association (User) is grayed out. What else can I do do unassociate.
 

My Computer

System One

  • Manufacturer/Model
    HP Compaq Presario/SR5113WM
    CPU
    AMD Athlon 64 X2 3600+ 1.9Ghz
    Motherboard
    Asus M2N68-LA
    Memory
    PNY Optima Memory DDR2 2GB 2x1 kit
    Graphics Card(s)
    PNY Nvidia 8400 GS 256MB
    Sound Card
    On board RealTek
    Monitor(s) Displays
    Acer X163W LCD
    Screen Resolution
    1366x768
    Hard Drives
    Western Digital 160 GB SATA 3G (3.0Gb/sec)
    7200 rpm
    Western Digital 160 GB IDE
    PSU
    Dynex 400w
    Case
    Nothin Special
    Cooling
    Stock
    Keyboard
    Standard 102 key with volume and sleep buttons
    Mouse
    Wireless Logitech LX7
    Internet Speed
    Comcrap 10mb cable
    Other Info
    Insignia 2.1 speakers, wireless Xbox 360 controller w/plug n play charger, Belkin wireless G + mimo usb network adapter.
Hello Mansrm. What file extension are you wanting to unassociate?
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
.001 from 7-zip I didn't want to always open with that program.
 

My Computer

System One

  • Manufacturer/Model
    HP Compaq Presario/SR5113WM
    CPU
    AMD Athlon 64 X2 3600+ 1.9Ghz
    Motherboard
    Asus M2N68-LA
    Memory
    PNY Optima Memory DDR2 2GB 2x1 kit
    Graphics Card(s)
    PNY Nvidia 8400 GS 256MB
    Sound Card
    On board RealTek
    Monitor(s) Displays
    Acer X163W LCD
    Screen Resolution
    1366x768
    Hard Drives
    Western Digital 160 GB SATA 3G (3.0Gb/sec)
    7200 rpm
    Western Digital 160 GB IDE
    PSU
    Dynex 400w
    Case
    Nothin Special
    Cooling
    Stock
    Keyboard
    Standard 102 key with volume and sleep buttons
    Mouse
    Wireless Logitech LX7
    Internet Speed
    Comcrap 10mb cable
    Other Info
    Insignia 2.1 speakers, wireless Xbox 360 controller w/plug n play charger, Belkin wireless G + mimo usb network adapter.
.001 from 7-Zip? I do not see a file extension listed for that in 7-Zip. :confused:


Anyways, you can unassociate it by: :)
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
I did the open with and associated it that way.
 

My Computer

System One

  • Manufacturer/Model
    HP Compaq Presario/SR5113WM
    CPU
    AMD Athlon 64 X2 3600+ 1.9Ghz
    Motherboard
    Asus M2N68-LA
    Memory
    PNY Optima Memory DDR2 2GB 2x1 kit
    Graphics Card(s)
    PNY Nvidia 8400 GS 256MB
    Sound Card
    On board RealTek
    Monitor(s) Displays
    Acer X163W LCD
    Screen Resolution
    1366x768
    Hard Drives
    Western Digital 160 GB SATA 3G (3.0Gb/sec)
    7200 rpm
    Western Digital 160 GB IDE
    PSU
    Dynex 400w
    Case
    Nothin Special
    Cooling
    Stock
    Keyboard
    Standard 102 key with volume and sleep buttons
    Mouse
    Wireless Logitech LX7
    Internet Speed
    Comcrap 10mb cable
    Other Info
    Insignia 2.1 speakers, wireless Xbox 360 controller w/plug n play charger, Belkin wireless G + mimo usb network adapter.
OK, I'm glad that you got it sorted out. :)
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
Hello Bluefire, and welcome to Vista Forums.

You might download and double click on the REG file I attached below, then restart the computer to see if it may help. It will remove the registry entries for the .blob file extension to hopefully unassociate it for you.

Hope this helps,
Shawn
 

Attachments

  • Unassociate-BLOB.reg
    424 bytes · Views: 535

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
When I run the program and find the extention .dat (which I want to unassociate) the Remove file association (User) is grayed out, what can I do?
 

My Computer

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
Sorry, it doesn't work, it appears "Impossibile importare C:\...\Default.reg: non tutti i dati sono stati scritti correttamente sul registro. Alcune chiavi sono utilizzate dal sistema o da altri processi."

Which means: "It is impossible to merge C:\...\Default.reg: there are some data which are not correctly written on the register. Some keys are being used by the system or some other process."
 

My Computer

Hi Robs,

Try doing this:


  1. Open your start menu
  2. In the search box, type regedit.exe
  3. Right click on the search regedit.exe and select Run as administrator
  4. Navigate to: HKEY_CLASSES_ROOT/.dat
  5. Click the on a key you want to take ownership of.
  6. On the Edit menu, click Permissions.
  7. Click Advanced, and then click the Owner tab.
  8. Under Change owner to, click the new owner, and then click OK.
  9. Repeat for the other keys in that folder
  10. Try running that .reg file again, as instructed by Brink
 

My Computer

System One

  • Manufacturer/Model
    Build #1
    CPU
    Intel Core i7 3770K @4.4GHz
    Motherboard
    ASUS P8Z77-V PRO
    Memory
    Corsair Vengeance 2x4GB DDR3 1600MHz Low Profile (White)
    Graphics Card(s)
    Gigabyte Radeon HD 7850 (2GB GDDR5)
    Sound Card
    Integrated on motherboard
    Monitor(s) Displays
    23" LG LCD/LED IPS
    Screen Resolution
    1920*1080
    Hard Drives
    Samsung EVO 128GB SSD
    Seagate Barracuda 2TB 7200rpm
    2x500GB Seagate FreeAgent 5400rpm
    PSU
    Corsair TX650W V2 (80+ Bronze)
    Case
    NZXT Phantom 410
    Cooling
    Corsair H100 Water Cooler, 1x140mm and 1x120mm stock fans
    Keyboard
    Microsoft Desktop 2000 Wireless Keyboard
    Mouse
    Microsoft Desktop 2000 Wireless Mouse
    Internet Speed
    95 Mb/s Download 70 Mb/s Upload
It works! :) Thanks a lot buddies, you were awesome!

Thanks for letting us know how it went. I'm glad we managed to get you all up and running again :)
 

My Computer

System One

  • Manufacturer/Model
    Build #1
    CPU
    Intel Core i7 3770K @4.4GHz
    Motherboard
    ASUS P8Z77-V PRO
    Memory
    Corsair Vengeance 2x4GB DDR3 1600MHz Low Profile (White)
    Graphics Card(s)
    Gigabyte Radeon HD 7850 (2GB GDDR5)
    Sound Card
    Integrated on motherboard
    Monitor(s) Displays
    23" LG LCD/LED IPS
    Screen Resolution
    1920*1080
    Hard Drives
    Samsung EVO 128GB SSD
    Seagate Barracuda 2TB 7200rpm
    2x500GB Seagate FreeAgent 5400rpm
    PSU
    Corsair TX650W V2 (80+ Bronze)
    Case
    NZXT Phantom 410
    Cooling
    Corsair H100 Water Cooler, 1x140mm and 1x120mm stock fans
    Keyboard
    Microsoft Desktop 2000 Wireless Keyboard
    Mouse
    Microsoft Desktop 2000 Wireless Mouse
    Internet Speed
    95 Mb/s Download 70 Mb/s Upload
That's great news Robs. I'm happy to hear that you got it sorted. :)
 

My Computers

System One System Two

  • Operating System
    Windows 10 Pro 64-bit
    Manufacturer/Model
    Custom
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G7 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
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