The good news is that there are some easy solutions to the problem you seem to be experiencing. To confirm; this particular guide is for computers using a USB Bluetooth adapter - this is a small USB stick sticking out of a USB port somewhere on your computer that provides Bluetooth support for the computer to connect with various wireless accessories. In case you're not sure what a USB Bluetooth adapter looks like, click here. If you can't find such a device sticking out of a USB port then you're in the wrong guide and should return to this page.
When you are ready to continue just click the LET'S GET STARTED button at the bottom of the page.