Hi heartstar, Welcome to the Community, Since the external wireless card works fine,the reason why the internet is slow with internal wireless card could be due to loose antenna cables.There are two antenna cables attached to the wireless card (WLAN). Since you have already updated the wireless card drivers,try reseating the antenna cables and see if that helps. If you are comfortable opening the laptop,use the manual below  and refer to page  37 for help to access the WLAN card on your system model: support.dell.com/.../om_en.pdf[IMAGE]
something is really wrong with my dell wireless 1702... speed is about 1-2 mbps...but when i connect the external usb wifi DLINK the speed is awesome about 30-40mbps.... dont know what to do...installed new drivers, new bios firmware... also new audio drivers... but nothing happens, speed is really SLOW.... what to do? pls help
very slow wifi coonect on inspiron n5110