I opened up a c++ .h file with notepad with out realizing
that the "always open with" check box was checked.
Now my compiler doesn't recognize all my header files.
How can I change the "open with..." association back to
unknown application.

Responses much appreciated.

[Start]
Settings
Control Panel
Folder Options
File Types tab
Scroll down until you see the H extension
Click on it
Click [Delete]
Click [OK]

Austin M. Horst