Installing IIS After ASP.NET

For those of us who decide after the fact that we will need to install Reporting Services, and we didn't install IIS, there is a rough path that sometimes has to be traversed due to the fact that ASP.NET was installed first which means that it will not be registered appropriately with IIS. This is recognized by the SQL Installer, and it will not allow you install Reporting Services until you have resolved it. I found the solution to this in four easy steps:

1. Click Start -> run -> cmd - ENTER
2. At the command prompt, type the following, and then press ENTER:"%windir%\Microsoft.NET\Framework\version\aspnet_regiis.exe" -i
3. Register the Aspnet_isapi.dll by clicking start -> run
4. In the Open text box, type "regsvr32 %windir%\Microsoft.NET\Framework\version\aspnet_isapi.dll" and then press ENTER

In both of the above paths, version is the directory that corresponds to the version of .NET that you installed.

The original Source of this information is Mike Viehweg's site.