I have created an application in VS C# Express 2008 using Windows 7 as my OS. It runs perfectly fine on other W7 machines, but when we try and deploy it on a machine with XP
Not a lot of info but some things to check:
Make sure you have the latest patches on XP and SP release
Maybe you need to run the program as administrator - are you logging in as admin
Have you checked the windows appliation error log to see if there is anything there that might be helpful