Asus updating your bios
In Windows, this is arguably slightly more complicated.
Insert a floppy disk into your drive and right-click the corresponding drive symbol inside the Windows Explorer (usually A:). Delete all files except Command.com, and from the disk, even those that are invisible.
Even if the BIOS update is designed to be run from a floppy disk you can usually use a USB flash drive, but you may need to first enter the BIOS to tell it to boot from the CD or USB drive instead of the hard drive.
Typically you won't need to as a PC or laptop will be set up to look for a removable disc or drive before trying to boot from the hard drive.
Alternatively, look for a 'Press F10 for boot options' or similar as your computer is starting to bring up a list of drives.
To make a USB drive bootable, you will need a utility such as Rufus or Unetbootin.
Sometimes this will be done automatically as part of the updating process, but if it requires you to do it manually, be sure not to skip this step.
The easiest way is to look in the user manual of your mainboard.
Under the View tab check Show hidden files, folders and drives and uncheck Hide protected operating system files.
In most cases, nothing will go wrong at all, but it's important to know that there's an associated risk and not to treat the process too lightly.
It's good to have a spare copy of all important files from your PC before you start.
For this reason, it's worth checking whether you really need to update your BIOS.
Read the release notes of the latest version (and each version back to the one currently installed) to see whether it will add the features you need or fix a problem you're having.