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Anthony Trudeau

I found a rather simple way to remove a file association (default program) tonight that I thought others might find useful.  I found it after discovering that Windows 7 doesn't provide a straight-forward way of removing an association.

Windows 7 provides a nice interface in the Control Panel for changing associations (Programs > Default Programs > Set Associations), but once you have one you cannot get rid of it.  The Registry is an obvious choice, because that's where the associations are stored.  In fact, the HKEY_CLASSES_ROOT hive has the association, but there is also a key you need to delete somewhere in the HKEY_CURRENT_USER hive.

Doing a little poking around, I discovered a command line program called ASSOC that'll do it.  And typing HELP ASSOC confirms that it was what I was looking for.  The solution to my problem turned out to be as simple as typing ASSOC .BIN="" on the command line.

Posted on Saturday, September 29, 2012 7:43 PM | Back to top


Comments on this post: Removing a File Association

# re: Removing a File Association
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Hi, Thanks, that's a nice little tip. Hacking my registry didn't seem to be working. Running this and associating my extension with "" was quick and simple.
Left by A North on Feb 18, 2015 2:55 AM

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