Go online & go to the Manufacturer's site (in Example above: Aopen is the Manufacturer) or if you can not find it by typing in a location such as WWW.AOPEN.COM, try using a Search Engine such as www.google.com & search for the name of the Manufacturer.

Look for a link on the Manufacturers site such as Support, or Drivers, & click on it.  This should take you to their support page & may have a list of different model numbers of modems to choose from.  Choose the correct modem & follow the instructions for downloading & installing the newest drivers.

IMPORTANT! Be sure that you know which model of your modem!

Installing the wrong drivers can keep you from connecting; sometimes connecting, but no pages load; or connects & loads pages, but kicks you offline constantly.