This is a Wi-Fi adapter that basically just plugs into a USB port. Drivers are built-in. If your computer doesn't have the drivers, plugging in this device will make it recognized as a CD-ROM or USB memory, from which you can install them. If there's a defective product, please contact us via the navigation system. We will exchange it. We cannot respond to issues mentioned in ratings or comments. If you don't understand the meaning of words like "download" or "install," please research them yourself. To change the quantity, please comment. A 5% discount is available for bulk purchases of 10 or more, and a 10% discount for 50 or more. There are no other discounts. Shipping is via standard mail, so there is no tracking or compensation. If the item doesn't arrive, we will file an investigation request, but we will not accept cancellations. The following additional fees are required to change the shipping method: Rakuraku Mercari Delivery == 165 yen Yuyu Mercari Delivery == 185 yen Click Post == 135 yen Letter Pack Light == 340 yen Letter Pack Plus == 505 yen Supported environments and specifications are as follows: Standard == IEEE802.11b/g/n Speed == 150Mbps Chipset == RTL8188 Realtek Frequency == 2.4GHz OS == Windows XP and later The drivers support the above versions, but we do not support anything other than 10. Also, we cannot answer questions about Mac and Linux as we cannot test them. If you have a USB port and the OS is compatible, it should work, so please check your device before asking questions like "Will it work on ××?" Except for issues with the product, we do not accept cancellations. Purchase application comments and greetings after purchase are completely unnecessary. We will not respond to them.