>Okay, I wrote a simple HTML program called and then saved it as an ASPX file, HelloWorld.aspx. I made a virtual directory called ASPNET35 whose physical path is: C:\INetPub\wwwroot\ASPNETStepbyStep\
>
>The program is very simple. If you will notice, I added the one line of code: %@ Page Language = "C#" % to make it respond as an aspx file should respond. I got this to work on my laptop, but not on my desktop. I do not understand why this is so different between one machine and another. IIS is active and the virtual directory is good.
>

It's possible ASP.NET isn't correctly registered on that machine. Do this from a command prompt:

CD "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727"
aspnet_regiis -i