This is a healthy Genmidi.WSL file for Riptide modem model PC80079 or D-1156IVT1/R5. Unzip this file and copy it to replace the corrupted Genmidi.WSL in your "windows\system" subdirectory. If necessary (if you still get a not working "Master Riptide PCI Audio Device"), remove the Master Riptide PCI Audio Device drivers to let the computer to reinstall the drivers. I tested this file in many HP PCs; included but not limited to HP Pavilion 4440. Good luck.