Hi I'm an IT professional providing remote support to clients over a number of remote Audio interface PC systems built by me. These remote servers were built using XP Pro OEM discs. Due to Dropbox and Google Chrome ceasing support for XP I now find myself in the unfortunate position of having to upgrade all these systems. I'm trying to upgrade them all to Windows 7 Pro as this allows Microsoft Remote Desktop Server. As the systems were originally built using OEM can I use OEM Windows 7 discs ?