The process of downloading the TP-Link TL-WN821N v4 USB Adapter Utility driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the TP-Link TL-WN821N v4 USB Adapter Utility driver from the primary server - this is the manufacturer’s TP-LINK official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the TP-Link TL-WN821N v4 USB Adapter Utility diver.