You might think that upgrading from Vista or XP to Windows 7 would be a snap. You buy the software, pop in the disc and away you go. Well, it is that easy, but only if you are happy to carry out a custom install, where you install a completely fresh copy of the OS and then load on your programs and files afterwards. While I think of a clean install as giving the best possible results, it’s a hassle that many people looking to upgrade their systems would like to avoid. Most people I’ve spoken to want to do what Microsoft calls an “in-place upgrade” where they get to keep their files, settings and programs intact.