How to stop exe to download even directory browsing is off

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.NET

IIS

C#3.5

I have location on the IIS To that location Directory browsing is Turned Off. But User is able to download the exe file when he gives the full path in the browser. Any Suggestions how i can re direct to dummy page when tries to access the .exe file.

Localhost/test/test/ -- Permission Denied
Localhost/test/test/setup.exe -- able to download
-TIA

What I have tried:

I have location on the IIS. To that location Directory browsing is Turned Off. But I have .exe file in the folder. User is able to download the exe file when he gives the full path in the browser. Any Suggestions how i can re direct to dummy page when tries to access the .exe file.