Download the drivers for your Windows version from the motherboard manufacturer's website. Then just install them - they will overwrite the existing drivers.
However, there is no need to install the latest drivers at all if everything seems to working properly, in fact it's advisable not to update drivers just because new versions exist as some new drivers can often cause problems where none existed before. My advice is to leave your existing drivers as they are, and only install a newer version of a particular driver if it addresses a specific problem that you're experiencing. With drivers, the golden rule is "If it ain't broke, don't fix it!"
Enjoy your new rig!