Turning Wi-Fi connection on, on my (Windows 7) Dell Vostro 1540?

How can I turn my Wi-Fi connection on, on my Windows 7?

well up until this morning, it was fine, I was connected wirelessly to my usual Local Area Connection via my sagem router, as I had been for the last year.
And then suddenly, out of nowhere, my connection becomes unavailable- along with the others that i normally pick up.
So we call Sky, thinking that it was the router, but after some discussion and inspection with her, and after realising i was still connected wirelessly to the same Wi-Fi connection on my iPhone and accessing the internet fine. She told me that I would need to seek PC support, as somehow, my wireless connection has been turned off on my laptop.

Somebody please help me, as i do not like being stuck next to the router because i need the ethernet cable plugged in. I need to be portable.

I would Really appreciate ANY help and support you could give me!

Many many thanks,

Jade Fox, 22, Coventry, UK.

Try turning your router off for about 20 secs, turn back on then try again. Or perhaps you've accidentally switched it off, look in your handbook. The symbol if you have it looks like an upturned umbrella, sometimes depending on make has to be pressed with the Fn key.

Since other devices connect OK, it must be the Dell.

1) Some laptops have a little 'switch' on the side or front that turns off WiF = this is very easy to 'knock' into the 'off' position:-)

2) Windows sometimes 'forgets' your 'home' Wi-Fi 'profile' settings (often this is after you have been 'roaming' i.e. Using a Wi-Fi 'hot spot' away from home) == go into Wi-Fi settings and try re-setting the profile (password etc)