Use a USB adapter.  Less than $20 older os will need drivers Windows 8 and 10 you plug in and it works [URL]  
Hey, I am looking to buy a wireless card for my optiplex 330 and I have come across this one made by dell [URL] (WIFI + BT) I just would like to know if this card fits in my case and if it's compatible.  I know it's a mini PCIe card but I thought they are the only ones that fit because my pc is half size/small factor, (DT edition). If it's not, should I search for a full sized one?
Wireless card compatibility - Optiplex 330