Could you please enlighten us with a few more details?
Were you able to install the product successfully?
Are you saying the OS now refuses to boot, that VS.NET 2003 hangs when you
start it, or that the failure occurs at a certain point when you are using
VS.NET?
If the last, what are you trying to do when the hang occurs?
Can you tell us exactly at what point the failure occurs and quote any
message the accompanies the failure?
Details will get you much better suggestions.