Here is a link to get the software for your printer.
Please choose the correct version for Windows 7 (32bit or 64 bit).
Here's how to determine which version your computer is running:
Download and save the programme to your computer. I suggest the desktop so that you can easily find it. Once downloaded you can run the programme to install your printer. You will need a USB cable to connect the printer to your PC and please don't plug it into the printer until you are told to do so by the software programme.
Here is a link for your user manual
If you have any questions please reply by pressing the "reply to expert button" rather than rating my service.