I recently had some problems running telerik Sitefinity on my dev machine. When I clicked on the Pages menu, it would give me a popup telling me that IIS 8.0 returned a 404.
All the help online talked about reregistering the WCF stuff using Servicemodelreg.exe, but doing that seemed to screw stuff up even more. Others also talked about using aspnet_regiis, but that doesn’t work in Windows 8.
Finally, I found this post that dealt with the exact issue. Adding the WCF Services under Turn Windows features on or off worked perfectly.
Thanks to http://proq.blogspot.com/