I currently have Visual Studio 2008 Professional installed on my Windows 7 (x64) laptop.
I also have SQL Server 2008 Express and Crystal Reports 2008 installed.
Can I upgrade Visual Studio 2008 Pro to Visual Studio 2010 Premium and if so do I have to make any configuration changes to any other apps I have installed?
no, you cannot “upgrade” Visual Studio in the traditional sense. Visual Studio exists side-by-side (sxs) with older versions, so you have both versions installed. What does get upgraded is the CSPROJ (or VBPROJ) files that represent your projects.