i have an Inspiron N7110 with i7 2630QM, gt525m video card and 1702 wireless adaptor.
In the manual it says that: Wireless WLAN, WiMax/Wi-Fi bgn/abgn, and Bluetooth wireless technology (optional) / WiDi (optional)
My config has wifi + bt 3.0 but i don't know if it has widi.
From intel's site i see that my i7 support the widi but i must have an intel centrino wireless adaptor...
In Drivers page from Dell it is a driver for centrino wireless but when i install the driver a blue screen appears (windows 7 64bits) and in the Computer Manager appears Intel® Centrino® Wireless Bluetooth® 3.0 + High Speed Devices but it doesn't says what model.
Finally, in Intel My Wifi Technology application it says "no addaptor found"...
How do i know that i have or don't have the WIDI on my laptop ? it is just a driver problem or i don't have this addaptor on my config?
You need to replace the Dell 1702 wireless card (which is not Intel, but Broadcom) with an Intel wireless card.
This is not a software issue - you need new hardware to have Widi support - it works only with Intel adapters.