How to Enable “Always use the selected program to open this kind of file” Option in Open With Dialog

Posted by lm on Stack Overflow See other posts from Stack Overflow or by lm
Published on 2010-03-30T06:36:39Z Indexed on 2010/03/30 6:43 UTC
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Hello,

How can I enable “Always use the selected program to open this kind of file” pption in Open With dialog box?

I already checked following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer 
Value of "NoFileAssociate" Set to 0 ( as reccomended on Microsoft site )  

HKEY_CLASSES_ROOT\Unknown\shell\openas\command 
Value of "Default" set to 
%SystemRoot%\system32\rundll32.exe %SystemRoot%\system32\shell32.dll,OpenAs_RunDLL %1

What else should cause the “Always use the selected program to open this kind of file” option to be disabled?

Your help will be very valuable Thanks

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