Hello and welcome to Tom's Hardware Forums.
First things first - is there a reward?
Seriously - does it show up in Control Panel>System>Hardware>Device Manager under Network Adapters and if it does, can you please right click it and go to Properties then click on Driver and Update Driver. That may kick-start it.
If it isn't in that list, check round the back to see if it has a light on when the cable is plugged in. Post back the make and model of your computer.
light is blinking. adapter missing form list. dell 1100 win. home ed