Hi. Here is my strange problem: After reinstalling windows 7 on my old pc, I cannot use my Ethernet cable to connect to internet. I have a dlink dsl2730u modem. When I connect the Ethernet cable to my pc, suddenly the internet and dsl lights on my modem turn off. As soon as I disconnect the Ethernet cable, the dsl light starts blinking again. I was able to connect to internet using Ethernet cable before I reinstalled windows 7. I used the very same cable and connected my laptop to my modem and there was no problem. (so, I concluded that the cable is fine) Also, I downloaded and installed the driver for my network adapter from Realtek website. But still there was no progress. Can anyone help me with this issue please? P. S: sorry for my bad English.