How add .iso extension on IIS mime type file

If you want download iso file from IIS webserver may you got 404 Error like following screen :

You must add the correct MIME type for the file you’re trying to download.

From IIS Manager, go to Sites > YOUR_SITE> and in the features view, double-click MIME Types.

Under actions, click Add.

Enter the file extension iso and the MIME type application/octetstream

Click OK and retry your download.