To ensure the computer recognizes the PSR-S550, follow these steps in order: Easily Connect a Yamaha Keyboard to a PC or Mac - wikiHow
Official downloads are segmented by operating system. You can find the latest versions on the Yamaha Corporation website: yamaha psr s550 midi driver
As the progress bar crept forward, Leo cleaned the dust off the Yamaha’s jog dial. He remembered buying this gear second-hand; it had the perfect "sweet spot" sounds that modern software plugins just couldn't replicate. Click. Installation complete. To ensure the computer recognizes the PSR-S550, follow