"Always use this program to open these files" is grayed out. Why?

Posted by Herb Caudill on Super User See other posts from Super User or by Herb Caudill
Published on 2010-06-17T00:31:27Z Indexed on 2010/06/17 0:33 UTC
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windows-7

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Windows

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default

I inadvertently set the Registry Editor to be the default editor for *.txt files. Now when I go to change the default, "Always use this program to open these files" is grayed out. This is the case whether I right click on the file and choose "Open with...", or start with the "Set Default Programs" control panel.

alt text

Why? How can I fix this?

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