I recently downgraded my Toshiba A135-S4666 laptop from the pre-installed windows vista to my Windows XP disk. Everything seems to be working find except my built in Ethernet card. When I look at my connection it shows that I am connected but no files are being sent or received. I assume this is because I have not installed the correct drivers for this hardware. I've tried installing the LAN drivers on the cd several times and looked at some old XP drivers as well. Has anyone done this successfully who knows where I can find the correct drivers or what the actual problem is?
Look in Device Manager and check the properties on the card. Any yellow exclamation marks? Does it show the driver installed? If Device Manager doesn't show you the exact manufacturer and model of the ethernet card, use a hardware ID program like Everest or Belarc to find it.
If DM does show the driver installed, could you have a firewall in the way? Or your card or router not configured to the internet modem?