Do you really want to mess with a adapter that does not even run 802.11n or 802.11ac.
In general the only hope for these old cards is to get drivers from the chipset manufacture. The addition issue you have is that card uses ralink chips which was purchased by mediatek. The best and safest place is the manufactures web site.
It is a matter of searching and hoping you find something. Be very careful there are a lot of scam sites that either don't really have the files they are just ad click sites or they have files you have to be extremely suspect of using. Do not run any kind of installer program a driver will be recognized and loaded windows directly from the correct file.