Did it work before and now it doesn't, or is this a new printer to this computer?
If it used to work, what did you change? (Installed updates, added/removed a program, etc?)
Try a different cable and port just to eliminate those variables.
Could try rolling back to a restore point.
In device manager for the driver, see if there is an option to go back to previous version; I've had a printer that worked but when driver updated it 'lost' it. When I rolled back to previous driver it 'found' it again.
Man, these computer issues can be SO frustrating!

-K