To install and set up the driver:
After the acquisition, MediaTek continued to develop drivers for Ralink's popular chipsets. This is why you will often see the manufacturer for this driver listed as either "Ralink Technology, Corp." or "MediaTek, Inc.," depending on the date of the driver package. In short, your "802.11n USB Wireless LAN Card" almost certainly contains a Ralink chipset, now managed by MediaTek. 80211n usb wireless lan card driver version 51220
This is a classic symptom of Windows Update replacing a working generic driver with an incompatible one. The solution is to roll back the driver. In Device Manager, right-click your adapter, go to Properties > Driver tab, and click "Roll Back Driver." If the button is grayed out, you will need to perform the manual installation steps again. To install and set up the driver: After
Once you have downloaded the driver package (usually a .zip file), follow these steps to install it properly. This is a classic symptom of Windows Update
Not every 802.11n USB adapter uses this driver. Based on INF file analysis and hardware ID databases, is compatible with the following Realtek chipsets:
Click , browse to the extracted folder, select the .inf file, and click OK to force the installation. Maximizing Performance of 802.11n Hardware
To configure and use the wireless LAN card: