Most of you should be familiar with the File association error, where Windows will ask you to choose a program to open a file that you try to execute. It will be very easy to select the program if the file is say a “.txt” file or a “.mp3? file. You can select notepad to open a “.txt” file and may be winamp to open a “.mp3? file. And this can be fixed easily by selecting the option “Always use the selected program to open this kind of file” that you see on the “Open with” window.