How can I change dat file extension back to unknown file?

General discussion about file extensions and file formats.
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masterx
Posts: 5
Joined: May 14, 2013, 12:08 pm

How can I change dat file extension back to unknown file?

Postby masterx » June 29, 2013, 12:16 pm

Hi,
I don't know how to restore file type association in Windows to the default state with no associated program.

In Control Panel -> All Control Panel Items -> Default Programs -> Set Associations: When Windows not know which app should open a dat file type, it assigns a blank default icon to this file.
In my case, I associated dat file with wrong program by mistake and forgot to uncheck the box Always use the selected program to open this kind of file in open unknown file dialog. How do I delete/restore it?

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Malric
Posts: 218
Joined: February 13, 2013, 9:26 am

Re: How can I change dat file extension back to unknown file

Postby Malric » July 1, 2013, 10:49 pm

You can generally deselect certain filetypes in start -> default programs -> set your default programs. Just select the program from the list and click on the choose defaults for this program which will show you list of types associated with it. Decheck the box and save it.

ooilverhawk
Posts: 1
Joined: February 7, 2015, 9:54 am

Re: How can I change dat file extension back to unknown file

Postby ooilverhawk » February 7, 2015, 9:58 am

it assigns a blank default icon to this file.


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