You need to use quotes since there are spaces or just go to that directory and run the file.

"C:\Windows\Microsoft .NET\Framework\v1.0.3705\aspnet_regiis" -i


>Cathi
>
>I tried that and it gave me the following error: "Command "C:\Windows\Microsoft" is not valid."
>
>What should I do now?
>
>Thanks!
>
>Nicky