hi Jnita & welcome to Geeks2Go
The "update driver" button in Device Manager only searches Microsoft's own driver library on it's website, with the result that it will often report "no newer driver found", leading you to believe that a newer driver doesn't exist. A newer driver may well exist, it's just that Microsoft doesn't have it.
The usual procedure for getting the latest drivers relevant to your PC is to visit the PC manufacturer's website (usually they will be in the 'downloads' section of their customer support pages) or if the drivers are for the motherboard itself and your PC manufacturer doesn't have a driver page on it's website, you can visit the website of the motherboard manufacturer if you know it's make and model number.
Edited by pip22, 24 February 2008 - 02:28 AM.