HTTP Error 404.3 - Not Found" while browsing wcf service on Windows Server 2008(64bit)

Please make sure you've activated WCF components from here.

Or alternate and easy way is, go to control panel -> Turn Windows feature on or off -> and make sure you've all the options ticked as mentioned in below screenshot.

You might need to activate each box and accept in case you get errors when activating all features at once

OK, here is the answer:

Go to Handler Mappings | Add Handler Manager --> And then add below information

Request Path: *.svc

Type: System.ServiceModel.Activation.HttpHandler, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

Name: svc-Integrated

If anyone has this issue on Windows Server 2012, Bill Moon's answer here solved it for me:

"For Windows Server 2012... From the Server Manager, click on Add roles and features, select the appropriate server, then select Features. Under .NET Framework 4.5 Features, you'll see WCF Services, and under that, you'll find HTTP Activation."

I have windows 10 in my laptop and using visual studio 2015 for WCF development. WCF is running fine in visual studio but when hosted in IIS I got the same error.

I checked IIS handler. svc extension was missing. So I tried to add new handler in IIS as suggested by Mori in first answer. I didn't find type "System.ServiceModel.Activation.HttpHandler".

So I opened "Turn windows features On or Off" and installed features as highlighted in screen shot.

This worked for me.