Right click on "My Computer" icon and select properties.
Click on "Hardware", then "Device Manager".
Click on the "Multi-port Serial Adapters".
Right click on the "Chase PCI-RAS x multi-modem Adapter".
Click on "properties".
Click on the "Driver" tab to show the driver version.

To update the driver,

Select the "Update Driver..." button.
Make sure you have the new driver available for updating.
Restart your computer .