[quote user="Dave Carlile"]For XP, right click and select "run as".  Select "the following user", then select a user with Administrator permissions.[/quote] My account is an administrator and it's the only one on the computer.

[quote user="Ashu Tatake"]Try launching it with "run as admin" and see if that helps? [/quote] How do you do that? (I have the same configuration and am receiving this error)

Great, that's exactly what I needed to know. Thanks!

Just how much C# do I need to know? I've been doing the "Absolute Beginner's C#" from MSDN; the course goes through the basics of C# programming and, as a project, creating an RSS reader program in the end. Do you think that this should be enough, or should I learn more C# before going on to learning XNA in specific?