Manually register ASP.NET if IIS is installed after the .NET Framework

Framework installation installs ASP.NET automatically only if IIS is already installed.if you install IIS after the Framework you need to manually register ASP.NET.

Go To C:\WINDOWS\Microsoft.NET\Framework\VERSION
[here C:\ is Windows installation drive on your machine.]
(e.g. VERSION is v2.0.50727)

You'll see there aspnet_regiis.exe.
Run that on command line with -i switch (e.g "aspnet_regiis -i"). That'll register ASP.NET to your machine as well as creates the ASPNET user.