How to fix 'Unknown device is found' message for Contex XD2490?
- EErika PerkinsNov 16, 2025
If you're seeing an 'Unknown device is found' message, here are a few things to check: * Ensure your interface is enabled on the PC and set up correctly. Review the installation steps for your interface board and driver, and confirm that the Windows device manager lists the interface option. * If WIDEsystem drivers weren't installed before connecting the scanner, shut down both the scanner and PC. Disconnect the power and USB connections, then restart the installation from step 1. * Check for loose interface connections on both ends of the cable. Unplug and firmly plug the interface cable back in. * Reboot the system: shut down the scanner and PC, unplug the power and USB connections. Plug in the USB connections, turn on the PC, and once Windows has loaded, plug in the scanner pow...












