Ethernet Controler + Resume Issues

Question

Two problems
1) Every week or so the ethernet controler disappears and I have to reboot for it to find it, sometimes it does, sometimes it doesn't. If it doesn't find it I have to do a system restore.
2) I have Vista and I have big problems on resume. I have tried to change to Hibernation, Sleep or nothing after so many minutes and it doesn't change anything.