@Honey_Badger357 What version of Windows are you using? What part of the instructions isn't working for you?
... open Device Manager by pressing Windows Key + R and type devmgmt.msc, or launch from the Start menu by typing "Device Manager". On Windows 10, you can right-click on the Start icon and click on "Device Manager". Look for ... any "Generic USB" devices, which would indicate that the Duet driver is not installed. If a USB device does show ... as a Generic USB device, right click on the device. Click Install Driver and browse to the location of the driver that was downloaded at the beginning of this step. Continue setup by clicking "Next" until the device driver has been installed.Ian