Posted 12 September 2008 - 02:42 PM
Did he reformat it and reinstall windows? If so you no longer have the drivers for your NIC card.
Control Panel> System > Hardware Tab > Device Manager. Do that for me.
Now look through the list, do you see any thing flagged with a Yellow exclamation point?
If so go to your computers manufacturers website and download the appropriate drivers for your model computer.
If I am helping you and I do not respond within 24 hours, please send me a PM.