Hardware drivers are the bits of software Windows uses to communicate with your PC’s hardware. Device manufacturers create these drivers, and you can obtain drivers straight from the manufacturer of your devices. Manufacturers also submit drivers to Microsoft for testing and signing, and you can get many drivers from Microsoft through Windows Update. Often, you won’t need to bother with updating drivers, but you may sometimes need to get the latest version—especially if something isn’t working right. While they are tempting, we recommend that you don’t use driver-update utilities.
Read full content : http://toptenbiz.com/how-to-update-drivers-in-windows-7-and-8-automatically/
There are some good reasons to update drivers, though. In particular, gamers generally should keep their graphics drivers as up-to-date as possible to ensure the best graphics performance and the fewest bugs with modern games. In other cases, you might need to get the latest version of a hardware driver if the current one is causing problems with your computer.