Should ASP.NET v2 IIS server extension be missing after .NET 4 is installed?

Question

I'm having a ton of issues when my ASP.NET sites are using version 2. For example, all my SVC and ASPX files return "file not found". Also when I use IISMgr and navigate to:

ServerName ..... Web Service Extensions

I notice that ASP.NET v2 is not present. I tried aspnet_regiis but no luck. Does anyone have Windows 2003 with .NET 4 installed? Can you tell me what you have for ASP.NET 4.x so I can manually re-add the IIS extension?

UPDATE

aspnet_regiis.exe – i seemed to now have worked. But I'm still having issues with WCF. I just tried reinstalling WCF using ServiceModelReg -i and I get this in the event log

Also, this is what ServiceModelReg -ls looks like (note no Web Host Script Mappings exist)

Answer 1

A probable solution is here. Excerpt:

When you build Window 2003 R2 SP2 server – by default it has Microsoft.NET Framework 2.0 Service Pack 1 and Microsoft .NET Framework 3.0 Service Pack1 installed. You will notice ASP.NET v2.0.50727 is MIA(missing in action) in Web Services Extension in IIS manager. How you make it appear and make it as an “allowed” service?..start a DOS window – change to the following directory

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727> or C:\WINDOWS\Microsoft.NET\Framework64\v2.0.50727> for 64 bit

Type aspnet_regiis.exe – i

EDIT: I just now read that you tried aspnet_regiis - did you use the correct Framework folder depending on your processor architecture?