ASP.NET IIS trouble

If you, by mistake, first installed .net framework, and after that IIS you may have trouble to run your IIS/Web service applications.
One of the possible error messages can be: "Failed to access IIS metabase", or "service unavailable"...
To repair ASP.NET you should run:

aspnet_regiis -u
aspnet_regiis -i


It worked for me :)