Configure WiFi Settings for d620 latitude laptop

any on help me.

Hello and welcome to Tom's Hardware Forums.

Assuming your 620 runs Windows XP, you should have an icon in the bottom right hand corner of the screen which tells you wireless networks are available - you right click to see them, finds yours and connect to it using the security key. More help for that if you need it so just post back.

If you aren't seeing that icon, maybe your wireless adapter is turned off so look for the Function key with the ((0)) icon and press that and the Fn key at the same time.

There is a switch to wireless on / off. I have left to on but still can't see anything.