And did anyone follow the recommendations Microsoft laid out for them?
http://windows.microsoft.com/en-US/windows7/help/upgrading-from-windows-xp-to-windows-7 Its a guide from start to finish. Looking at the Advent support site and being redirected to another site for drivers, only shows XP drivers, so its my opinion that this machine is not Windows 7 compatible but you could try installing the drivers in XP compatibility mode for any device that isn't working.
http://social.technet.microsoft.com/Forums/en/w7itprohardware/thread/80cae5ee-dc98-4a2f-8284-a1ab826059b7 Another method too is to look at the device in device manager, properties, driver, update the driver from Windows Update Catalog and see if that'll do it.
MCSE, MCSA, MCDST
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