Please provide your full system specs.
Did you purchase it WITH the Samsung driver cd?
Did you buy it new, used, or refurbished?
Is your USB cable (for the pc to printer connection) less than 10 feet, AND known to be good?
Most USB printers are a snap to install.
Connect and turn on; then Windows 7 detects it and installs the drivers.
If that's problematic, then install using Samsung's drivers.
In either case, detection has to happen.
If you have a thumb drive, you can plug it in to each USB port to see if they are all working.