Visual Studio .NET Version Error

Sometimes (who am I kidding, most of the time) when we install a new VS.NET instance on a dev box, we get this error:

Visual Studio .NET has detected that the specified Web server is not running ASP.NET version 1.1. You will be unable to run ASP.NET Web applications or services.

The proper way to solve this error is with the following command:
C:\WINDOWS\Microsoft.NET\Framework\v1.1.xxxxx\aspnet_regiis.exe -i