I didn't find any laptop presented on ECS Elitegroup website, were you referring to notebook?
Click the link below, select a notebook model which is identical to yours, and you'll find what you need under Audio tag:
http://www.ecs.com.tw/ECSWebSite/Downloads/Downloads_list.aspx?MenuID=61&LanID=9
You can try update wizard bundled with Windows OSes as well:
Windows Vista
1 Open the "Start" menu and click "Control Panel." Then click "Hardware and Sound," followed by "Device Manager."
2 Locate "Sound, video and game controllers" and click the (+) sign to expand the menu and view your sound card.
3 Right-click the name of your sound card and select "Update Driver Software" from the drop-down menu. It is recommended that you choose the option to "Search automatically for updated driver software." Once your computer has located the most recent driver available online, it will automatically install the latest version.
Windows XP
1 Open the "Start" menu, click "Control Panel" and then click "System."
2 Click the "Hardware" tab, locate "Sound, video and game controllers" and click the (+) sign to expand the menu and view your sound card.
3 Right-click the name of your sound card and select "Update Driver Software" from the drop-down menu to automatically install the latest version.