Hi StartingTo,
Drivers as per your system model shows in support site.
1703/1705 DW - www.dell.com/.../inspiron-17-3721
1704 Dell Wireless + BT - www.dell.com/.../inspiron-17-3721
If you further need help - Add Saharsh (Dell) as a friend and send him a private IM - en.community.dell.com/.../default.aspx