How undo a file association?

  • Thread starter Thread starter Pegasus \(MVP\)
  • Start date Start date
P

Pegasus \(MVP\)

Fred said:
Found it. It could have been easier though. I had to search in Regedit
and found the extension under the key
HKCU\Software\Microsoft\Windows\Current version\Explorer\FileExts
Then deleted the key.

More user friendly if it had been listed under folder options|file types

Fredrik
Click to expand...

This is exactly where it is, and it works too when I click the "Delete"
button.
 
Hello,

I right-clicked on a file, selected to open it with an application and
also checked always use this application.

How do I undo this? I want to change it back to "Unknown"

The file type or the extension is not listed in the control panel|folder
options|file types.

Thanks

Fredrik
 
Fred said:
Hello,

I right-clicked on a file, selected to open it with an application and
also checked always use this application.

How do I undo this? I want to change it back to "Unknown"

The file type or the extension is not listed in the control panel|folder
options|file types.

Thanks

Fredrik
Click to expand...

Found it. It could have been easier though. I had to search in Regedit
and found the extension under the key
HKCU\Software\Microsoft\Windows\Current version\Explorer\FileExts
Then deleted the key.

More user friendly if it had been listed under folder options|file types

Fredrik
 
Pegasus said:
This is exactly where it is, and it works too when I click the "Delete"
button.
Click to expand...
Well, it wasn't for me. I checked several times and neither the file
type or the extension was is "file types". I'm sure.

Fredrik
 
An example. From a command prompt;
assoc .dll=
to remove any association from DLL

--

Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft Certified Professional
Microsoft MVP [Windows]
http://www.microsoft.com/protect

:
| Hello,
|
| I right-clicked on a file, selected to open it with an application and
| also checked always use this application.
|
| How do I undo this? I want to change it back to "Unknown"
|
| The file type or the extension is not listed in the control panel|folder
| options|file types.
|
| Thanks
|
| Fredrik
 
Pegasus said:
Have a look at the attached picture. I clicked the Delete
button and hey presto! the association was history. If
this does not work on your PC then your Windows
installation is damaged.
Click to expand...
Thanks, it works for me too *if* the extension is listed under "file
types". However, in my case I right-clicked on a file, selected an
application and checked "always use this program". After that the file
(.rdf) was associated with the application (Wordpad).

But when I should undo the association, neither "RDF-file" was listed
under "File types" or "RDF" was listed under "Extensions" in "Folder
options|File types".

According to my experiences, I have to choose "new" to get an extension
registered. Just checking "always use this program" isn't enough.

Fredrik
 
Dave said:
An example. From a command prompt;
assoc .dll=
to remove any association from DLL
Click to expand...

I reassociated .rdf files with Wordpad by right-clicking and selecting
"always use this program". After that RDF files opened with Wordpad, I
checked.

Then I tried from the command prompt: assoc .rdf=

However I got this error message: "It wasn't possible to find any
assocociation for the file extension .rdf"

So I still had to delete the key:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rdf]

Fredrik
 
That's not what happened here. I created a file with ZZZ extension and chose
open with winword.exe. Then;
C:\>assoc .zzz
..zzz=zzz_auto_file

then;
C:\>assoc .zzz=

and result now is;
C:\>assoc .zzz
File association not found for extension .zzz

C:\>

BTW was that message converted to past tense? Always quote messages
verbatim.

These two may also be of interest.

http://support.microsoft.com/kb/257592/
http://support.microsoft.com/?kbid=320033

--

Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft Certified Professional
Microsoft MVP [Windows]
http://www.microsoft.com/protect

:
| I reassociated .rdf files with Wordpad by right-clicking and selecting
| "always use this program". After that RDF files opened with Wordpad, I
| checked.
|
| Then I tried from the command prompt: assoc .rdf=
|
| However I got this error message: "It wasn't possible to find any
| assocociation for the file extension .rdf"
|
| So I still had to delete the key:
|
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rdf]
|
| Fredrik
|
 
Dave said:
That's not what happened here. I created a file with ZZZ extension and chose
open with winword.exe. Then;
C:\>assoc .zzz
.zzz=zzz_auto_file

then;
C:\>assoc .zzz=

and result now is;
C:\>assoc .zzz
File association not found for extension .zzz

C:\>

BTW was that message converted to past tense? Always quote messages
verbatim.

These two may also be of interest.

http://support.microsoft.com/kb/257592/
http://support.microsoft.com/?kbid=320033
Click to expand...
Thanks, However I don't think I understand your question about convert.
You mean correct behaviour in this group is to reply above quoted text?

Fredrik
 
You quoted;

"It wasn't possible to find any assocociation for the file extension .rdf"

I don't think this was the exact text of the error message.

--

Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft Certified Professional
Microsoft MVP [Windows]
http://www.microsoft.com/protect

:
| Thanks, However I don't think I understand your question about convert.
| You mean correct behaviour in this group is to reply above quoted text?
|
| Fredrik
 
Dave said:
You quoted;

"It wasn't possible to find any assocociation for the file extension .rdf"

I don't think this was the exact text of the error message.
Click to expand...

I see! I have a none English Windows version. This means I sometimes
have to guess the English text of different messages. So, if I had used
an English version, the message would have been:
"File association not found for extension .rdf"

Fredrik
 
OK, gotcha.

--

Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft Certified Professional
Microsoft MVP [Windows]
http://www.microsoft.com/protect

:
| I see! I have a none English Windows version. This means I sometimes
| have to guess the English text of different messages. So, if I had used
| an English version, the message would have been:
| "File association not found for extension .rdf"
|
| Fredrik
 
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