Q: If you are not able to change the file association.?? A: 1. Go to "Start" -> "Run" 2. Write "Regedit" and press on "Enter" button 3. Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer 4. In the right side of the screen double click on "NoFileAssociate". 5. Change the value of "NoFileAssociate" from 1 to 0. 6. Close "Regedit".