The HP ScanJet Enterprise Flow 5000 s4 is the scanner that needs multiple Fujitsu scanners but lacks the budget to do so. To see what to expect or how to troubleshoot an issue, please see below.
A USB Error can be attributed to many issues but is often due to the USB cable being disconnected from the computer or the scanner so you will want to unplug both ends, check for debris and then reinsert. If the issue persists, restart the computer after saving all your important documents as it may have had a hiccup. You will also need to make sure that the PC stays awake as being off will trigger the message. As a last resort, you may also try switching the USB cable to where your keyboard and mouse are connected or test on another computer with another device.
A quick way to do a test scan is to head on over to the Devices and Printers area in the Control Panel. Find the HP ScanJet Enterprise Flow 5000 s4, right-click on it and select the ‘Start Scan’ option.