If you're unable to find the driver on the UMAX website, you can try searching for it on a third-party driver website, such as:
Connect the scanner to a (older scanners often fail to communicate properly via USB 3.0). Power on the scanner. umax usc 5800 scanner driver for windows 10
Find the scanner (likely under "Other devices" with a yellow exclamation mark). If you're unable to find the driver on