Were you able to confirm the service is pointing at stunnel.conf and not stunnel.cfg maybe?

> Date: Thu, 21 Aug 2014 16:43:16 -0700
> From: 541401@gmail.com
> To: stunnel-users@stunnel.org
> Subject: [stunnel-users] Stunnel Windows Server 2008 R2
>
> I have installed stunnel 5.03 on Windows Server 2008 R2 X64. When I
> run it as an application it works perfectly. When I install and run the
> service, it starts but the start notice window, title bar, says Stunnel
> 5.03 win32 (not configured). It appears that the stunnel service is not
> reading the stunnel.conf.
>
> If anyone has any suggestions how I can successfully run stunnel as a
> service, I would be very appreciative.
>
> Thank you!
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