Hi Arlen Duncan III, Ideally the applications working in Windows 8 should work in Windows 8 Pro as well as they are designed on a same platform. It is just that Windows 8 Pro has some additional features than Windows 8. You can check the comparison for Windows 8 and Pro from the link: [URL]  In reference to Dell applications compatible with Windows 8, you may refer to link: [URL]  There is another link that you can check: [URL] to know know more about Windows 8 Pro upgrade.   Please reply for further clarifications. 
This is going to be a silly question. If I upgrade to Windows 8 Pro from Windows 8 will the pre-installed software for my brand new Inspirion i13z work after the upgrade?  Such as the Dell support center software and the related software? As I was reading the information on Microsoft's website about upgrading might cause the software to stop working, I just wanted to clarify that the pre-installed software will still work after the upgrade.  Thank you, 
Windows 8 upgrade to Windows 8 Pro Pack