For "Unknown Devices" in your Device Manager, you can search for the Hardware ID on DriverIdentifier to find matching Windows 8.1 compatible files. Key Hardware Drivers
may require manual installation of the Conexant High Definition Audio driver originally built for Vista. Usage Tips for Windows 8.1 Finding Compaq Presario C767TU drivers Compaq presario c700 drivers for windows 8.1
). While Windows 8.1 may not be listed, you can often use in "Compatibility Mode". For "Unknown Devices" in your Device Manager, you
