It works fine on my XP Pro system. Make sure all files are copied to the Windows/system and windows/sytem32/drivers folders, 12 files in all. Other than that make sure you have the correct codecs to decode the type of files you imported into Maestro. Installing something like PowerDVD may help if you haven't already installed it. Media player won't play the files until this is installed. A quick check would be to play them in Media player to see it can play them.