Do you lose ADSL connection on W8901g? What kind of settings do you have on ADSL routera?

I told about alternative firmware for TP-Link routers

do you mean the power supply? Yes I thought about the power supply in wife computer.

How do I check the ethernet adapter IP address conflict - via ipconfig? Do I then need to check the IP's of all the other devices in the house? Yes you are right. Also if a conflict, how do I change...

Curious reason :)

Maybe your computer may emit some noises (exactly AC)