I assume you use the parallel or serial port to connect with your old computer, while the new computer hasn't such ports. Maybe you bought the wrong computer?
Luckily, there are PCI-E parallel adapter cards. Buy and install it, that should help.
My home computer is a windows 10 pro and it dose not have the hook up for my printer. My printer is an old printer but it works very well still it is a hp laserjet 4050TN. Before I bought my new pro 10 computer my old home computer has the hook up for my printer /This new computer does not..Help!!