On an Internet computer, Download the zipped file from the link below and save it to a USB Flash drive. Plug it into the troubled computer and create a new folder on your Desktop and Extract (unzip) the file to the new folder. Open folder, run Setup.exe.
To install the driver.
Description Ralink Wireless Lan Driver and Application
File Size 22.93 MBytes update 2013/12/12 Download from Global