I am running windows 7. I have the default program for `.py` files set to the `python.exe`. If I double click a `.py` file it will launch correctly with python. 

But in the windows explorer the icon next to `.py` files shows like it would if they were `.txt` (a sheet of paper with a folded corner) 

Somewhere along the way the default program got set to notepad which is when the icon changed to this, but it has since been changed back to python and is working correctly with the python exe. But the icon didn't switch back when this change occurred. 

Is there anything I can do to force it to switch to the standard `.py` icon rather than the txt one?