from Vista to Win 7?
If so it may be that Win 7 isn't recognising them correctly despite them being seen by applications.
Are they all compatible with Win 7?
Other than that I have no idea.
I have a number of printers on the same port ( different versions of PCL5 , PCL6, and PS drives ). In the Windows 7 Control Panel "Devices and Printers" a whole slew of versions are missing and only the latest printer installed on that port is shown. But if I open up a Print.. dialog from any of my applications the names of all the Printers are there from which I can choose.
Why does not the Control Panel "Devices and Printers" show all my printers in Windows 7 ?
Under Windows Vista I can see all of them.