Unassociate File Extension Type

Yes, open up default programs from the start menu, then click the "associate a file to a program link" in the window that appears, then scroll down to .mp4 and click change program. Navigate to the Windows Media Player .exe.
 

My Computer

System One

  • Manufacturer/Model
    Sony Vaio Z46GDU
    CPU
    [email protected] w/6MB L2 cache 1066MHz FSB
    Memory
    6GB DDR3 1066MHz SDRAM
    Graphics card(s)
    9300M GS 256MB + Intel Integrated 4500MHD
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    Screen Resolution
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Hi Frostmourne,

Sorry, I guess my post wasn't clear. I don't want the .mp4 files to be associated to anything. It turned out that Windows Media Player does not play the .mp4 files so I rather un-associate the .mp4 files from Windows Media Player.

Thanks!
 

My Computer

System One

Then, try right-clicking the program and running as administrator since the software has to access the registry which it can't without permission.
 

My Computer

System One

  • Manufacturer/Model
    Sony Vaio Z46GDU
    CPU
    [email protected] w/6MB L2 cache 1066MHz FSB
    Memory
    6GB DDR3 1066MHz SDRAM
    Graphics card(s)
    9300M GS 256MB + Intel Integrated 4500MHD
    Monitor(s) Displays
    13.1" WXGA True Colour Tough
    Screen Resolution
    1600x900
    Hard Drives
    320GB SATA 7200RPM
    Internet Speed
    1MB/s

My Computer

System One

  • Manufacturer/Model
    Sony Vaio Z46GDU
    CPU
    [email protected] w/6MB L2 cache 1066MHz FSB
    Memory
    6GB DDR3 1066MHz SDRAM
    Graphics card(s)
    9300M GS 256MB + Intel Integrated 4500MHD
    Monitor(s) Displays
    13.1" WXGA True Colour Tough
    Screen Resolution
    1600x900
    Hard Drives
    320GB SATA 7200RPM
    Internet Speed
    1MB/s
tropicalchic said:
Hi Frostmourne,

Sorry, I guess my post wasn't clear. I don't want the .mp4 files to be associated to anything. It turned out that Windows Media Player does not play the .mp4 files so I rather un-associate the .mp4 files from Windows Media Player.

Thanks!
Click to expand...


Open regedit,Expand Hkey_classes_root. Find .mp4 key and delete the entire key.

Restart your computer.

Let me know the result. :) (Restart is must)
 

My Computer

System One

  • Manufacturer/Model
    Wipro
    Motherboard
    Intel dq35j0
    Memory
    8 Gb
    Graphics card(s)
    inter express chipset
    Sound Card
    Realtek
    Monitor(s) Displays
    Wipro
    Screen Resolution
    1024*768
    Hard Drives
    500 gb
    Mouse
    Dell
    Keyboard
    DELL
    Internet Speed
    100 mbps(office lan)
Frostmourne said:
Open up a cmd prompt from the search box in vista by searching for cmd, right clicking on the icon and selecting run as administrator. It has to run with higher priveleges. Then follow this:

Remove File Extension Associations and Unassociate File Types in Windows Vista - Tips & Tweaks
Click to expand...

I tried unassociating the extension file using cmd prompts assoc .mp4= followed by ftype WMP11= but those didn't work for me.

I went back to the "unassoc_1_4.zip" utility that I downloaded from An Utility to Unassociate File Types in Windows 7 and Vista and clicked "Delete file type" button (I think this deletes file extension from the registry) since the "Remove file Association (User)" button was grayed out. This works! The .mp4 files are no longer associated to Windows Media Player and the WMP icon is also removed. Now when I click on any .mp4 file, Windows asks me to choose a program to open with. This is exactly with I wanted!

Thanks everyone for your suggestions!
 

My Computer

System One

delphin said:
tropicalchic said:
Hi Frostmourne,

Sorry, I guess my post wasn't clear. I don't want the .mp4 files to be associated to anything. It turned out that Windows Media Player does not play the .mp4 files so I rather un-associate the .mp4 files from Windows Media Player.

Thanks!
Click to expand...


Open regedit,Expand Hkey_classes_root. Find .mp4 key and delete the entire key.

Restart your computer.

Let me know the result. :) (Restart is must)
Click to expand...

Hi Dephin,
I think your suggestion would work. But I didn't get to try it since it was posted after I have already resolved it using the unassoc_1_4 utility as described in the previous thread. Thanks again for your help!
 

My Computer

System One

No probs mate :)
 

My Computer

System One

  • Manufacturer/Model
    Wipro
    Motherboard
    Intel dq35j0
    Memory
    8 Gb
    Graphics card(s)
    inter express chipset
    Sound Card
    Realtek
    Monitor(s) Displays
    Wipro
    Screen Resolution
    1024*768
    Hard Drives
    500 gb
    Mouse
    Dell
    Keyboard
    DELL
    Internet Speed
    100 mbps(office lan)
delphin said:
tropicalchic said:
Hi Frostmourne,

Sorry, I guess my post wasn't clear. I don't want the .mp4 files to be associated to anything. It turned out that Windows Media Player does not play the .mp4 files so I rather un-associate the .mp4 files from Windows Media Player.

Thanks!
Click to expand...


Open regedit,Expand Hkey_classes_root. Find .mp4 key and delete the entire key.

Restart your computer.

Let me know the result. :) (Restart is must)
Click to expand...


I tried your suggestion of deleting the entire reg key, & reboot. It did not remove the file-type ext assoc. I am trying to unassociate the ext ".IFO" from Media Player.
 

My Computer

System One

If you want to use other program for playing .ifo files, You can set the player as default for the .ifo files by changing the program in control panel>classic view>default programs.

If you want to remove all association from .ifo files you have to delete the .ifo reg key from hkcr.

:)
 

My Computer

System One

  • Manufacturer/Model
    Wipro
    Motherboard
    Intel dq35j0
    Memory
    8 Gb
    Graphics card(s)
    inter express chipset
    Sound Card
    Realtek
    Monitor(s) Displays
    Wipro
    Screen Resolution
    1024*768
    Hard Drives
    500 gb
    Mouse
    Dell
    Keyboard
    DELL
    Internet Speed
    100 mbps(office lan)
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