If you’ve ever clicked on some file in Windows and seen this dialog box, you know what I’m talking about:
The web service is completely useless, and most of the time you already know what program you want to use to open the file. Luckily, it is easy to disable this dialog box with Default Programs Editor (download). Simply launch the program, and click on the Options button:
Then, click the button that says
Disable 'Search web for unknown extension' Dialog Box
And that’s it!
Now, when you try to open a file with an unknown extension, Windows will skip the unknown extension dialog and display the “Open With…” window to choose a program.