How to solve a “HTTP Error 404.3 - Not Found” error?

Question

Simple problem. I start up VS2008 and create a new WCF Service application. This will create a default application with a few test methods showing it works. I press CTRL+F5 and

Answer 1

I tried running ServiceModelReg and aspnet_regiis.exe with various flags and added HTTP Activation feature but it still didn't work. What finally worked was adding the following handler manually to my web.config file.

My project was running .Net 3.5 and IIS was 7.5 and 7.0.