Last month I purchased Toshiba Satellite A105-S4547 laptop. By default it was running Windows Vista in it. But I did not like the Vista OS, so I downgraded Vista Home to Windows XP Pro. Now I am unable to find proper drivers for my laptop. The Wi-Fi seems to be working but the RJ45 jack is not at all responding. So I wanted to know where I can find the Ethernet Controller diver for Windows XP running Toshiba Satellite A105-S4547 laptop. Please help me with your valuable suggestions.