You have 2 options:
1. Go to Google and search for "Minolta qms magicolor 2 driver"
2. Go to the Minolta support site and download the driver
Take your pick. Either will work great. If the manufacturer does not support Windows 7 then you are probably screwed. The vendor's compatability list is located here:http://kmbs.konicaminolta.us/wps/portal/web/home/support/product-compatibility