hi,John.Thanks for your purchase.
It needs to install the driver. But it has built-in driver inside and you can install it directly. You don’t need to insert external CD or download any external driver from online link to install the driver.
You just need to plug this wifi adapter into the USB port of your computer, then click a driver ” REALTEK ” showing in “My Computer ” to install, that will be OK.
If any more inquiries, please feel free to contact our service team anytime.