assuming you have a wireless router in your place and wireless adapter in your laptop best suggestion is Fn+F2 for dell..go to network connections inside control panel(in classic view) ..you must see local area connection and/or wireless network connections..right click on the wireless network connection icon select view available wireless networks...if it doesn't have the networks listed there 2 possibilities
NO wireless connections were found would be general message below it
no wireless networks were found in range
it might either read wireless capability is turned of implying wifi switch is off..
or you might be using another software to connect..meaning some other software like dell wireless card utility or ur adapter's software might be active using which u must scan and connect wireless....
I just get 'No wireless networks were found in range. Make sure the wireless switch on your computer is on'. It's a desktop pc . Can connect ok using a laptop so I know there's no problem with the router.