Welcome to Seven Forums
Since it is a discontinue item you might want to try to find a compatible driver by going to your device manager>right click on the device>properties>details tab>drop down menu> select hardware id> Copy and Paste the hardware id string. And we can use it to search for a driver.
Since it is 7 years old now and support ended 3 years ago my second bit of advice would be to just break down and buy a Windows Seven Compatibile wireless adapter.
Thanks Fabe