Then, install the new Win-10 driver for your Ralink's model Wifi and latest driver.
But and before you install any new Win-10 driver(s), delete all your previous drivers from your system, to do this, go to 'Device Manager' and right click on your wireless network driver and 'Uninstall Device' and completely uninstall that devices driver, also check if you have any drivers in 'Control Panel' under 'Uninstall a program' in the list of drivers, if you do then uninstall that too.
Look in 'Device Manager' under 'Network Adaptors' you should have something like this “Ralink XXXX Wireless Network Adaptor' then go to Ralink web page and get your Ralink's model latest Win-10 driver.
