>Could anyone who has upgraded from XP Home to XP Pro tell me if I'll need to reinstall my applications software and files?
According to this, you can upgrade and your settings, applications and data will be okay.
http://www.microsoft.com/windowsxp/pro/howtobuy/upgrading/matrix.aspDespite this, back up your system. The upgrade (like any major change) could destabilize your system.
