Hi Howard,
Thank you for posting your query in Microsoft Community!
I understand that there are no drivers for Konica Minolta Pagepro 1390MF for Windows 8.
Windows Compatibility Center does show any compatible drivers for Windows 8
http://www.microsoft.com/en-us/windows/compatibility/win8/CompatCenter/ProductViewerWithDefaultFilters?TempOsid=win8&Locale=en-us&TextSearch=PagePro%2B1390MF%2B&Type=Both&CurrentPage=0&TotalPages=1&ShowCriteria=0&SortCriteria=Relevance&Compatibility=Unknown&LastRequested=14
I would suggest you to install the drivers for Windows 7 in Compatibility mode.
Follow the steps given below to install the drivers in Windows 7 compatibility Mode.
Install the drivers in Compatibility mode.
Install the drivers from the manufacturer’s website. If Windows 8 drivers are not available, you can install Windows 7 drivers in compatibility mode. Follow these steps:
Note: Download the latest drivers from the Manufacturer’s website and save it on to the Desktop.
http://onyxftp.mykonicaminolta.com/Download/SearchResults.aspx?productid=984
a) Press the ‘Windows + W’ key on the keyboard.
b) Type compatibility in the search box and then press
enter.
c) Click “Run programs made for previous versions of Windows” option from the list appeared in the left side.
d) Select the drivers and install.
Also refer the article given below.
Make older programs compatible with this version of Windows
http://windows.microsoft.com/en-US/windows-8/older-programs-compatible-version-windows
Hope the information helps! If you need further assistance, please feel free to post. We are here to help you.